Journal articles on the topic 'Road defect identification'

The sequence of carrying out of researches of tires of a freight vehicle on the basis of expert practice is considered. The research of tires of a truck has been conducted, an example of an expert research of tires is resulted, as a result of which the causes of damage of tires were established. The tire connects the vehicle to the road, perceives its weight, braking effort and dynamic impact that arises due to the roughness of the road surface. It is not uncommon for the vehicle to operate even on roads with a satisfactory road surface and damage to the tires. Damage to the tires can be generated as a result of industrial damage (factory defect) and as a result of operational damage. The most common and serious cause of premature wear and damage to tires is non-compliance with the established air pressure norms and overload tires. Changing the configuration of the profile and increasing the deformation of the bus cause an increase in the voltage in its material. As a result, it increases its premature wear. At increased load (overload) the tension voltage in the places of contact of the tire with the road increases and its specific pressure on the road, from which the tread wears away more quickly. Overvoltage in the material and increase in deformation is accompanied by a general increase in friction and heat formation in the tire. At increased load (overload) the tension voltage in the places of contact of the tire with the road increases and its specific pressure on the road, from which the tread wears away more quickly. Overvoltage in the material and increase in deformation is accompanied by a general increase in friction and heat formation in the tire. In the course of the research it was established that the tires Satoya SD 062-III have operational damage, the detects damage to the tires was formed as a result of their operation, which could contribute to vehicle overload, non compliance with tire pressure and the movement of the vehicle on roads with improper road surface. External inspection the examination of Satoya SD 062-III tires showed no signs of industrial damage (factory defects).

Abstract This paper intends to achieve improved image processing for the clear identification of defects in damaged road pavement structure using infrared thermography non-destructive testing (NDT). To that goal, 4 types of pavement specimen including internal defects were fabricated to exploit the results obtained by heating the specimens by natural light. The results showed that defects located down to a depth of 3 cm could be detected by infrared thermography NDT using the improved image processing method.

Pavement smoothness has become a standard measure of pavement quality. Transportation agencies strive to build and maintain smoother pavements. Road users generally perceive the quality of a pavement on the basis of how well it rides, which is severely affected by the presence of defects (bumps or dips) in the pavement profile. Defects are corrected according to the smoothness specifications prescribed by respective agencies. The effectiveness of any method used to identify defect locations depends on the decrease in roughness obtained on correction of the defects. Following this line of thought, this paper presents a method for the detection of defects based on a comparison of the original profile with a target or a desired profile. The proposed methodology is based on the international roughness index (IRI) gain function for the identification of defect locations to improve smoothness in pavements. This method uses the discrete Fourier transform to help identify defect locations on the basis of deviations of the original profile from the target or the smoothened profile. Areas with defects have a higher deviation from the smoothened profile than areas without defects. This method also estimates the contribution of each defect to roughness. Roughness statistics, such as the IRI and the present serviceability index, are used in the proposed approach to determine the severity of each defect. In addition, the use of a quarter-truck transfer function instead of the IRI gain function is demonstrated to illustrate consideration of dynamic load criteria for the detection of defects. The approach is illustrated through the use of profile data collected for in-service pavement sections.

Introduction.Early defect illumination (cracks, chips, etc.) in the high traffic load sections enables to reduce the risk under emergency conditions. Various photographic and video monitoring techniques are used in the pavement managing system. Manual evaluation and analysis of the data obtained may take unacceptably long time. Thus, it is necessary to improve the conditional assessment schemes of the monitor objects through the autovision.Materials and Methods.The authors have proposed a model of a deep convolution neural network for identifying defects on the road pavement images. The model is implemented as an optimized version of the most popular, at this time, fully convolution neural networks (FCNN). The teaching selection design and a two-stage network learning process considering the specifics of the problem being solved are shown. Keras and TensorFlow frameworks were used for the software implementation of the proposed architecture.Research Results.The application of the proposed architecture is effective even under the conditions of a limited amount of the source data. Fine precision is observed. The model can be used in various segmentation tasks. According to the metrics, FCNN shows the following defect identification results: IoU - 0.3488, Dice - 0.7381.Discussion and Conclusions.The results can be used in the monitoring, modeling and forecasting process of the road pavement wear.

Asset management databases play a crucial role in the management of existing infrastructure assets. Highways England (HE) has a long history of using bridge management software to record the current state of bridges and to guide maintenance schemes and interventions. Reinforced concrete half-joints are amongst the most challenging structures to inspect and repair due to their susceptibility to deterioration and construction type. Hence, they require particular attention within asset management programmes. An Interim Management Strategy was developed by HE to identify all the structures on the Highways England road network with half-joint elements. These half-joint structures were then subjected to a special inspection regime. Out of the 428 half-joint structures with inspection data, 252 structures had defects associated with four existing HE defect classes. A review of the inspection database with a focus on half-joints led to an alternative classification of half-joint related defects based on a revised set of Defect Classes, the introduction of Defect Groups and the extraction of Defect Types specifically observed in half-joints. Using this new classification, the most common half-joint Defect Groups were found to be cracking, corrosion, spalling and deterioration mechanisms. In about half of the structures cracking and corrosion tended to be observed together. Correlations were also shown to exist between structural and deterioration, and constructional Defect Classes, emphasising the need for quality control and proper workmanship. Recommendations to address shortcomings in current inspection practice are proposed. Clearer defect definitions and decision-tree guidance for inspectors could enhance the consistency and repeatability of inspection data gathering thereby overcoming some of the limitations of subjective classifications. Acquiring additional information about the observed crack details including zonal information, crack patterns, crack extent, crack orientations and widths combined with local and global pictorial evidence would also be advantageous. This could then provide the basis for the automatic processing and identification of structures with specific half-joint related defects. In this way, asset managers would be better able to allocate limited resources to the most critical structures.

Improving the detection efficiency and maintenance benefits is one of the greatest challenges in road testing and maintenance. To address this problem, this paper presents a method for combining the you only look once (YOLO) series with 3D ground-penetrating radar (GPR) images to recognize the internal defects in asphalt pavement and compares the effectiveness of traditional detection and GPR detection by evaluating the maintenance benefits. First, traditional detection is conducted to survey and summarize the surface conditions of tested roads, which are missing the internal information. Therefore, GPR detection is implemented to acquire the images of concealed defects. Then, the YOLOv5 model with the most even performance of the six selected models is applied to achieve the rapid identification of road defects. Finally, the benefits evaluation of maintenance programs based on these two detection methods is conducted from economic and environmental perspectives. The results demonstrate that the economic scores are improved and the maintenance cost is reduced by $49,398/km based on GPR detection; the energy consumption and carbon emissions are reduced by 792,106 MJ/km (16.94%) and 56,289 kg/km (16.91%), respectively, all of which indicates the effectiveness of 3D GPR in pavement detection and maintenance.

The article uses a practical example to consider changes in the transport and operational state of the public highway and road surface, with the possibility of justifying and taking into account these changes in the design, operation and repair. The methodological approach of the road and road surface survey provides for the first stage of visual inspection of the road and identification of areas with visible defects of the existing roadbed and road surface. At the second stage, the asphalt roadbed was opened by pits in the most visible areas of damage in order to take samples of road clothing and subsequent analysis. Defects and causes of deformations of asphalt concrete pavement and existing roadbed were identified. Recommendations for eliminating the causes of deformations and strengthening the coating are given.

The current methods that aim at monitoring the structural health status (SHS) of road pavements allow detecting surface defects and failures. This notwithstanding, there is a lack of methods and systems that are able to identify concealed cracks (particularly, bottom-up cracks) and monitor their growth over time. For this reason, the objective of this study is to set up a supervised machine learning (ML)-based method for the identification and classification of the SHS of a differently cracked road pavement based on its vibro-acoustic signature. The method aims at collecting these signatures (using acoustic-sensors, located at the roadside) and classifying the pavement’s SHS through ML models. Different ML classifiers (i.e., multilayer perceptron, MLP, convolutional neural network, CNN, random forest classifier, RFC, and support vector classifier, SVC) were used and compared. Results show the possibility of associating with great accuracy (i.e., MLP = 91.8%, CNN = 95.6%, RFC = 91.0%, and SVC = 99.1%) a specific vibro-acoustic signature to a differently cracked road pavement. These results are encouraging and represent the bases for the application of the proposed method in real contexts, such as monitoring roads and bridges using wireless sensor networks, which is the target of future studies.

Road surface imperfections and aberrations generate shocks causing vehicles to sustain structural fatigue and functional defects, driver and passenger discomfort, injuries, and damage to freight. The harmful effect of shocks can be mitigated at different levels, for example, by improving road surfaces, vehicle suspension and protective packaging of freight. The efficiency of these methods partly depends on the identification and characterisation of the shocks. An assessment of four machine learning algorithms (Classifiers) that can be used to identify shocks produced on different roads and test tracks is presented in this paper. The algorithms were trained using synthetic signals. These were created from a model made from acceleration measurements on a test vehicle. The trained Classifiers were assessed on different measurement signals made on the same vehicle. The results show that the Support Vector Machine detection algorithm used in conjunction with a Gaussian Kernel Transform can accurately detect shocks generated on the test track with an area under the curve (AUC) of 0.89 and a Pseudo Energy Ratio Fall-Out (PERFO) of 8%.

Road traffic accidents (RTAs) are becoming a major problem around the world, incurring enormous losses of human and economic resources. Recent reports from the World Health Organization (WHO) reveal that each year more than 1.25 million people are killed and 50 million are injured in road traffic accidents worldwide. In Saudi Arabia, statistics show that at least one traffic accident occurs every minute, causing up to 7,000 deaths and over 39,000 injuries annually. In this study, the main causes of RATs in the province of Hail are examined. The data was collected through the use of a survey which was developed to evaluate the effect of influencing parameters on RTA rate. The results show that 67% of RTAs result from human factors, 29% from road conditions and 4% from vehicle defects. Excessive speed and violation of traffic rules and regulations were found to be the main causes of RATs. Low rates of compliance with speed limit signs and seat-belt regulations were also observed. These findings highlight the need of strengthening effective traffic law enforcement alongside with improving traffic safety and raising public awareness.

Highways are the most important component of country's economic development. They are a complex of engineering structures that are subject to various kinds of deformations during operation. The causes of premature defects are outdated technologies, poor quality materials, high traffic loads, and weather conditions. On average, after 2–3 years of the new road operation, pits, overflows, potholes, cracks, rutting occur on asphalt concrete pavement, its presence worsens the traffic conditions on the road and violates the unimpeded passage of cars. To extend the life cycle of a transport object, there are preventive measures that prevent the destruction of road surfaces. Such activities include regular maintenance and repair work. One of the effective measures is the use of road impregnation materials (RIM). Road-impregnation materials are used in case of need to prevent aging of the organic binder in the composition of asphalt concrete in the coating, as well as to reduce the impact of external factors. In this article, the influence of the basis of the impregnating material of two manufacturers on the indicators of the properties of asphalt concrete of various degrees of destruction is investigated. Among the considered impregnating compositions, solvent-based road impregnation materials proved to be the most effective. It has been established that the abrasive effect on samples of asphalt concrete significantly reduces the effectiveness of impregnating materials, especially based on bitumen emulsion.

The Design of intelligence pipeline leakage detector is nondestructive inspection using leakage detection principle to the internal metal defects, corrosion of pipeline.The detector adopts discrete sampling, realizing 12-bits high-speed multichannel-data collection through the FPGA, amount of the data can be up to 1024 road; and store mass data through ARM at the same time, shared data will be uploaded to the computer of control center through the network, the intelligent data analysis system engineering real-time analysis and quantitative identification, judge pipeline safety operation, provides the basis for safe duty time and maintenance cycle.

At present, the automatic classification of vehicles on roads is mostly based on image recognition, and there are defects in adaptability under non-line-of-sight environments. In this paper, based on the similarity of the integration of the ecosystem model and multi-neural network model, an artificial neural network group (BNNG) algorithm was proposed. The vehicle’s driving acoustic signal was taken as the research object, and it was calculated using the Artificial Neural Network (BNNG) algorithm to achieve automatic classification and recognition of vehicle models. Through experimental tests, it is shown that under non-line-of-sight environments, the accuracy of vehicle classification can be improved, and the misrecognition rate of similar models can be greatly reduced. This provided a new method for the automatic classification and identification of vehicles on roads, which was of great significance to monitor vehicle safety in non-line-of-sight environments.

Inadequate drainage of surface and subsurface water can have significant impact on pavement behavior and long-term maintenance costs. Interception of water before it infiltrates into the pavement foundation is essential unless the soils are truly free draining. Even then, there can be potential damage by frost action. Identification of seepage zones and surface runoff characteristics based on terrain conditions such as soils and geology can aid in the selection of a suitable road alignment and design to minimize future problems. However, most moisture–soil-related pavement performance problems are observed and corrected after construction of the facility. Case history examples of moisture damage were examined that relate to seepage from culverts, perched water tables, weathered zones in sedimentary rock, permeable glacial deposits, and ponded water. Construction defects and the effect of soil suction and exudation of water into the pavement structure were evaluated. With emphasis on inadequate surface and subsurface drainage conditions, ideas relating to improvements needed to correct deficiencies were developed.

SummaryVenous thrombosis is a multifactorial disease. Multiple interactions between genetic and environmental factors contribute to the development of the disease. Presently, we know of six or seven genetic risk factors for venous thrombosis. However, together these defects can explain the clustering of thrombotic events in only a small subset of families with thrombophilia. As to the identification of new genetic risk factors for thrombosis, we seem to have arrived at the end of a practicable road with the classical approach of thrombophilia, which usually starts with the study of the association of hemostatic phenotypes and thrombotic risk. At the same time we have undertaken various genetic approaches aiming at identifying polymorphisms/ mutations causing thrombotic risk. This review summarizes what we have learnt so far, what to do and what not to do. The odds for finding remaining common genetic risk factors for venous thrombosis during the next ten years may be predicted to be fairly high.

With the current system of concession roads in Brazil, both concessionaires and regulatory agents have been charged with improving the quality of the pavement on Brazilian highways. This situation requires the search for new tools that can facilitate the survey of pavement conditions in less time and at a lower cost than traditional methods. Recently, an increasing number of high-resolution spatial images have become available on the world market following the development of new remote sensing satellites and airborne sensors. Similarly, multispectral images and even hyperspectral images are now available commercially and for scientific research. The paper presents a new methodology for the identification of asphalted pavement surfaces condition and the classification of the main types of asphalt defects using hyperspectral images from airborne digital sensors. The objective of this study was to generate indexes of pavement conditions from images that can be compared with the indicators of pavement surface conditions already used by national regulatory agencies.

Pavements are major means of highway infrastructure. Maintenance and rehabilitation of these pavements for the required serviceability is a routine problem faced by highway engineers and organizations. Improvement in road management system results in reduction of time and cost, the pavement condition survey plays a big role in the pavement management. The initial phase in setting up a pavement management system (PMS) is road network identification. A vital element of a PMS is the capacity to assess the present condition of a pavement network and anticipation of future condition. The pavement condition index (PCI) is a numerical index generally utilized for the assessment of the operational condition & structural reliability of pavements. Estimation of the PCI is dependent on the results of a visual inspection in which the type, severity, and quantity of distresses are distinguished. In this research, a pavement distress condition rating strategy was utilized to accomplish the goals of this study. The main targets of this research were to categorize the common types of distress that exist on “Lakhi Larkana National Highway (N-105)”, and to estimate the pavement condition index. Using these data, Average PCI for the highway section was calculated. PCI to assess the pavement performance, 10 out of 19 defects were recognized in the pavement, as stated by the PCI method. Results indicated that the common pavement distress types were depressions, polished aggregate, rutting, potholes, block cracking, and alligator cracking.

Traditionally, pavement distress evaluations were carried out by visual observation. Traditional practice requires a person to walk along the stretch of the pavement to conduct distress survey, take photo and measure defects occurred at deteriorated surfaces. However, this approach is too subjective, generates inconsistencies of information, less reliable and time-consuming. Due to these shortcomings, the transportation practitioners in pavement maintenance seek for other alternative tools and techniques to arrest incapability of traditional practices. One of the tools available in the market is Ground Penetrating Radar (GPR). GPR is a geophysical tool known by ability to accommodate extensive data in pavement assessment, geotechnical investigation and structural assessment. The application of GPR is such new to most of road maintenance industry in Malaysia. Therefore, this study has been undertaken to evaluate the benefits of using GPR imaging and its application in assessing pavement structures in Malaysia. The GPR survey was conducted in Meranti street located at UTM (Universiti Teknologi Malaysia) campus, and then analyzed using REFLEX 2D simulation software. The finding shows there are three (3) types of information obtained from GPR survey included; identification of raw image and processed image, identification of pavement segments thickness, and identification of GPR response towards surface and subsurface conditions, which illustrated in radargram images. Furthermore, the GPR can perform at high speed and can save time. It is also beneficial for long-term investment due to ability to provide extensive information at a greater depth. The research indicates that interpretation of GPR’s radargram images consumes time due to the low resolution. Therefore, selection of GPR system is subject to level of accuracy and clarity of radar images needed in a project.

The article reveals the quantitative changes in the intensity of failure accumulations in areas with gradual introduction of high axial loads. To obtain the actual values, the authors received three-dimensional array of intensity of rail failure flow. According to the results of the research, it was discovered that the main cause of failure of the rails are the defects in the main contact-fatigue origin. The main factor that impacts the intensity of the rail failure flow is the number of transmitted tonnage. The size of the axial load and curvature of the line pours weight on this process. The proposed rail failure model is a model that can be used to optimize the track maintenance system. The authors conducted a study on the identification of quantitative changes in the intensity of accumulation of track failures in areas with high axial loads and evaluated their influence on the planning of repair and road works. On the basis of the obtained results it is possible to estimate the effect of the axial load on the intensity of changes in the state of the flow rail failure flows.

It is a function of the highways to provide comfort, safety, and good rolling conditions to users. Therefore, the roads must be correctly designed showing adequate quality and durability for use. However, what is observed in Brazil is that most of the existing roads are not in good condition due to the number of pathologies found in them, bringing discomfort and insecurity to users. Bearing in mind that the flexible floor is the most used in the country, it is necessary to study the defects found during its useful life, which may be of structural or functional origin, to offer adequate maintenance and possibly better-rolling conditions to those who travel through it. Thus, the present study tackles pathological problems observed on a flexible pavement in the Municipality of Teófilo Otoni, Brazil, its possible causes, and some proposals for measures to be taken in the construction and maintenance processes to reduce the appearance of these pathologies. In addition, the identification and classification of pathologies and nonconformities found in the studied places were carried out. Thus, there was a need for maintenance so that its functionality is not affected, requiring the use of recovery techniques through resurfacing or a sealing layer, improving drainage and milling, which provides longer life and avoids inconvenience to users.

<p><strong>Abstract.</strong> GPRs (Ground Penetrating Radar) are widely adopted in underground space survey and mapping, because of their advantages of fast data acquisition, convenience, high imaging resolution and NDT (Non Destructive Testing) inspection. However, at present, the automation of the GPR data post-processing is low and the identification of underground objects needs expert interpretation. The heavy manual interpretation labor limits the GPR applications in large-scale urban scenarios. According to the latest research, it is still an unsolved problem to detect targets or defects in GPR data automatically and needs further exploration. In this paper, we propose a deep learning method for real-time detection of underground targets from GPR data. Seven typical targets in urban underground space are identified and labelled to construct the training dataset. The constructed dataset is consist of 489 labelled samples including rainwater wells, cables, metal/nonmetal pipes, sparse/dense steel reinforcement, voids. The training dataset is further augmented to produce more samples. DarkNet53 convolutional neural network (CNN) is trained using the constructed training dataset including realistic data and augmented data to extract features of the buried objects. And then the end-to-end YOLO detection framework is used to classify and locate the seven specific categories buried targets in the GPR data in real time. Experiments show that the automatic real-time detection method proposed in this paper can effectively detect the buried objects in the ground penetrating radar image in real time at Shenzhen test site (typical urban road scene).</p>

This article presents a remote management architecture of an unmanned aerial vehicles (UAVs) fleet to aid in the management of solar power plants and object tracking. The proposed system is a competitive advantage for sola r energy production plants, due to the reduction in costs for maintenance, surveillance, and security tasks, especially in large solar farms. This new approach consists of creating a hardware and software architecture that allows for performing different tasks automatically, as well as remotely using fleets of UAVs. The entire system, composed of the aircraft, the servers, communication networks, and the processing center, as well as the interfaces for accessing the services via the web, has been designed for this specific purpose. Image processing and automated remote control of the UAV allow generating autonomous missions for the inspection of defects in solar panels, saving costs compared to traditional manual inspection. Another application of this architecture related to security is the detection and tracking of pedestrians and vehicles, both for road safety and for surveillance and security issues of solar plants. The novelty of this system with respect to current systems is summarized in that all the software and hardware elements that allow the inspection of solar panels, surveillance, and people counting, as well as traffic management tasks, have been defined and detailed. The modular system presented allows the exchange of different specific vision modules for each task to be carried out. Finally, unlike other systems, calibrated fixed cameras are used in addition to the cameras embedded in the drones of the fleet, which complement the system with vision algorithms based on deep learning for identification, surveillance, and inspection.

Growth in the population and road transportation for any region can create a higher demand for better road conditions and the less safe road conditions can be a great bottleneck for the growth of the nation. Hence most of the progressive nations like India,builds better infrastructure for the road transportations.Nevertheless,the higher populations in countries like India,demand greater maintenance of the roads and for a gigantic demographic, the maintenance work can be very tedious. Also,the damage in the road surfaces can also lead to the increasing rate of the accidents. Henceforth,the demand of the road maintenance is always increasing.Nevertheless, the existing road maintenanceauthorities deploy a manual process for identification of the repair needs, which is naturally highly time consuming. Thus, this work identifies the demand for automation of the road condition monitoring system and identifies the defects based on three classes as cracks, patch works and potholes on the road surface. The work deploys a novel model for parametric extraction, in order to segregate the defect types. The segregation of the defect types can be highly challenging due to the nature of the data,which clearly hints to solve the problem using unsupervised methods. Thus, this work also deploys a pragmatic clustering method using a decisive factor,which is again generated from the extracted features of parameters. The work demonstrates nearly 96% accuracy on the benchmarked dataset with sophistication on the complexity of the model.

This paper presents the defect identification, defect reduction and continuous improvement in public road transportation by using lean six sigma methodologies. Lean methodologies will reduce the waste i.e. unnecessary efforts or tasks. The main aim of lean is to improve productivity i.e. to increase profit to the organization. The six sigma methodologies are centered towards the elimination of variations i.e. reduction of defects. The main objective of six sigma is 3.4 defects per million opportunities, whichlead to fulfilling the customer requirements. The six sigma tools arearithmeticaland statistical based. The lean mainly focused on the flow and the six sigma mainly focused on the problem. By combining, these two methodologies and implementing in public road transportation will leads to increase the profit of the organization and customer satisfaction. The results achieved by using DMAIC methodology and lean tools.

AbstractHigh power solid-state Li batteries (SSLB) are hindered by the formation of dendrite-like structures at high current rates. Hence, new design principles are needed to overcome this limitation. By introducing dislocations, we aim to tailor mechanical properties in order to withstand the mechanical stress leading to Li penetration and resulting in a short circuit by a crack-opening mechanism. Such defect engineering, furthermore, appears to enable whisker-like Li metal electrodes for high-rate Li plating. To reach these goals, the challenge of introducing dislocations into ceramic electrolytes needs to be addressed which requires to establish fundamental understanding of the mechanics of dislocations in the particular ceramics. Here we evaluate uniaxial deformation at elevated temperatures as one possible approach to introduce dislocations. By using hot-pressed pellets and single crystals grown by Czochralski method of Li6.4La3Zr1.4Ta0.6O12 garnets as a model system the plastic deformation by more than 10% is demonstrated. While conclusions on the predominating deformation mechanism remain challenging, analysis of activation energy, activation volume, diffusion creep, and the defect structure potentially point to a deformation mechanism involving dislocations. These parameters allow identification of a process window and are a key step on the road of making dislocations available as a design element for SSLB.

Road maintenance action program must begin with identification of road surface defects before compiling a work program. One method of identification of road defects is the Road Condition Index (RCI) method. This method is simpler than the other methods because the survey method is by visualizing. This study aims to identify road defects with the RCI method carried out by several surveyors and how defects occur on the Caruban-Ngawi road section.The method used in this study is by direct survey of primary data on road surface defects conditions. There were 3 surveyors who conducted a survey with normal and opposite directions along the road. Data slices are made at lengths of every 100 m to identify road defects. The data is processed by doing an average on each data which is then made a strip map of road defects image. Data processing was done by determining the percentage of defects categories ranging from good, moderate, light defects, and heavy defects.The results of the study showed that the survey conducted by several surveyors was good and the general results were not significantly different. This means that the surveyors have almost the same perception in terms of assessing the condition of road defectss with the RCI method. The condition of road pavement on the Caruban-Ngawi road in general can be said that the road is still in good condition where heavy defects road damage in the normal and opposite directions is only 1.13% and 0.28% respectively.

Various defects in versatile pavements are proverbial since the existence of versatile pavement. Pavement structure is additionally destroyed in an exceedingly terribly single season with water penetration .Defects in versatile pavements may well be a cringe of multiple dimensions, fantastic growth of machine traffic (in terms of no. of shaft loading of economic vehicles), the fast enlargement within the road network, non-availability of acceptable technology, material, equipment, labor and poor funds allocation have all else complexities to the matter versatile pavements. Maintenance is ready of activities directed towards keeping a structure in an exceedingly terribly serviceable state throughout its vogue life, Maintenance of a road network involves a spread of operations, i.e., identification of deficiencies and developing with, programming and programming for actual implementation within the sphere and looking out . The essential objective need to be to stay the amount and appurtenances in condition and to increase the lifetime of the road assets to its vogue life. Broadly, the activities embody identification of defects and to boot the potential cause there off, determination of acceptable remedial measures; implement these within the sphere and looking out at of the results. Pavement failure is written in terms of decreasing utility caused by the event of cracks and ruts. Before going into the upkeep ways in which, we tend to have to be compelled to check abreast of the causes of failure of pavements. Failures of pavements are caused to several reasons or combination of reasons. This paper summarizes the continued researches concerning the defects in versatile pavement and to boot the maintenance in versatile pavements. A well-developed transportation infrastructure is crucial for economic, industrial, social and cultural development of a rustic. Maintenance is ready of activities directed towards keeping a structure in an exceedingly terribly serviceable state throughout its vogue life, Maintenance of a road network involves a spread of operations, i.e., identification of deficiencies and developing with, programming and programming for actual implementation within the sphere and looking out . The essential objective need to be to stay the amount and appurtenances in condition and to increase the lifetime of the road assets to its vogue life. This paper discusses the potential causes of pavement failures, and recommend better ways in which throughout to attenuate and hopefully eliminate the causes of failures in pavements.

The relevance of the problem under consideration is a consequence of the high cost of classical methods of pavement inspection. At the same time, the use of modern pulse georadars allows to ensure a relatively low cost of monitoring the current state of highways, since it allows to obtain georadar data when a laboratory vehicle is moving at the speed of a traffic flow. This minimizes the role of costly and time-consuming operations such as coring or cutting. The purpose of this work is to improve the methods for obtaining primary GPR data, which were previously proposed by the authors to improve the accuracy and reliability of the results of processing pulsed GPR signals. Materials and methods. When processing model and experimental data, first of all, modern theoretical methods of processing pulse signals from ground penetrating radars, as well as methods of computer modeling, were used. Results. Based on the analysis of the factors that determine the key features of GPR signals, a signal calibration method has been proposed, which makes it possible to increase the reliability of detecting such defects in layers of non-rigid road pavement made of monolithic materials, such as loss of interlayer adhesion, or identification of thin layers from an electrophysical point of view in multilayer media. Conclusions. Combining the signal calibration method together with the previously proposed approach to detecting the loss of interlayer adhesion and the performed numerical simulation made it possible to increase the reliability of the procedure for non-destructive testing of road pavements and other building structures. During the work, laboratory experiments were performed on model structures. The analysis of the obtained data was performed using the developed software GeoVizy.

Getting the Family Together: A Fieldwork Account The final gig of Bob Corbett and the Roo Grass Band’s 2013 tour is a hometown show at New Lambton Community Hall in Newcastle on the coast of New South Wales, Australia. The tour had already covered Newcastle and surrounds at various locations within 50 to 100km of the Newcastle CBD. In addition to lead singer and guitarist Bob Corbett, there are three main members of the Roo Grass Band, Sue Carson on fiddle and mandolin, Dave Carter on banjo, bass and bagpipes and Robbie Long on guitar, mandolin and bass. I enter the building and at the top of the stairs a tall, slim woman with a shock of red hair rushes to greet me with a hug, “It is so good to see you!”This is Veronica, Bob Corbett’s Mum. She’s been busy setting up the merchandise desk, taking tickets, and greeting almost every member of the audience by name. Veronica has functioned as de facto tour manager throughout the band’s Lucky Country Hall Tour. As well as running the merchandise desk and ticketing, she’s occasionally acted as roadie, and has supervised the packing of cars and trailers. These day-to-day jobs on the tour have been done with help from either her sister Roberta or, for most of the tour, a close friend of the band, Jenny. I deposit home-made chocolate brownies and biscuits in the kitchen, setting them up alongside fruit brownies made by Veronica for the audience. Bob’s wife, Kirrily, comes and says hello, followed by their son Marley, who heads straight for the goodies. Their daughter Matilda is running around with her best friend and next-door neighbour, Sophie. Dave, who plays banjo, bass and bagpipes in the band, greets his wife Karen as she arrives with their kids. The band’s fiddle player, Sue, is pacing around, looking fractious. I ask if she’s okay. “Yeah, it is just that my family is meant to be here already and they’re running late. They’re going to miss it.”Not long after, Sue’s partner, Michael (who is also Veronica’s brother, Bob’s uncle) arrives with their son Elijah and his son Gabe, in time for the show. This final gig of the tour seemed to have been largely arranged for the families of the band, and there was little advertising for it. In the way of family get-togethers a mix of tension and excitement fill the room. But once the band starts playing things calm down, a group of kids occupy the dance floor, twirling, swaying, skipping and running along with the music. Family, Authenticity, and Commercial Practices in Australian Country MusicI open with this fieldwork account to illuminate how the presence and involvement of family, through parents, spouses, aunts, uncles, children and even close friends are central to the experience of what it is to be a country music artist in Australia. In the case of Bob Corbett and the Roo Grass Band, for example, band members make choices to involve family in the activity of “being” a band—touring, performing, engaging with fans—and these choices have emotional value for them, but are also yoked to broader discourses of family which circulate in the field of Australian country music. This field story reveals that “family” is not something carved off from artists’ public engagement with the field of Australian country music but is central to it. Discourses of and around “family” are implicit in the practices of Australian country music artists and are strategically used by artists to define what country music is and what is valued in the field. Crucially, the discourse of family is used to support claims to authenticity within country music culture. Ideas about and associated practices concerning, “authenticity” permeate the culture of country music. The discourse reaches across all aspects of the field, and all participants in the scene are compelled to at least turn their minds to questions of authenticity, and develop strategies for dealing with them. Value is conferred on artists seen to convey so-called “true” and “genuine” personas. Indeed the country music community demands something referred to as “honesty” from performers. It needs to be noted that country music is a commercial popular music form and culture. Many agents in the scene have an uneasy symbolic relationship with the commercial aspects of country music, but it is a basic premise within the field: the music exists to make money. This is not to say that financial and popular success (in their quantifiable forms: money made, units sold, crowd sizes, radio spins) is the only thing valued in country music. As a form of cultural capital, authenticity is also valued. But within Australian country music a tension exists between the part of field underpinned by commercial logic and the idea of the popular and those underpinned by notions of creativity, independence and musical integrity. Authenticity is deployed to distinguish country music from other styles of music in a number of keys ways. Authenticity can be taken as an essential quality of music, which “honestly” reflects or expresses an identity or experience (e.g., Australian national identity, rural experience, heartbreak) (Watson, Volume 1; Watson, Volume 2; Sanjek); as a proper way of relating music, artist and audience (Smith); as a ideological watchword which tempers commerciality (Sanjek); or as something “fabricated” or constructed in the codification of the genre (Akenson; Peterson; Carriage and Hayward). I am not positing authenticity as a feature unique to Australian country music. A number of authors have highlighted the role authenticity plays in many forms of popular music to navigate, understand or obfuscate the functions of the commercial music industry and shape its output (Frith; Sanjek; Barker and Taylor). The scholarship on country music and popular music in general often explores how authenticity is inscribed in the products of country music, rather than the processes and practices behind those products: the everyday, extra-musical activities of participants in the scene. This article is concerned then with how discourses of authenticity are sutured to business, musical and promotional practices, and how such tropes function alongside discourses and practices concerning “family” in the negotiation of commercial realities in Australian country music. Rather than looking at end products, my research takes a ground-up approach, exploring what people are doing and how they talk about their practices and decisions. Discourses of “family”, and practices around kin, provide one of many possible entry points for this exploration. MethodologyThis article is based on ethnographic research on Australian country music. Between 2012-2014 I spent many months of focused immersion with Bob Corbett and the Roo Grass Band at festivals and on tour. This research was part of broader participant observation I conducted which included attending more than 150 country music events across New South Wales and Queensland. I also conducted hundreds of informal interviews at these events, as well as in-depth, semi-structured interviews with key informants, including band members Bob Corbett, Sue Carson, Robbie Long, and Michael Carpenter (sometimes drummer).Bob Corbett was recognised by the “mainstream” Australian country music scene in 2012 after winning the Star Maker competition. Since the win Bob and the band’s success within the field has increased—higher album sales, larger crowds, more airplay, recognition, sponsorships and nomination for Golden Guitar Awards (the main Australian country music industry awards). They play a mercurial mix of styles including bluegrass, Western swing, pop folk, and rock. At the core is a concern with storytelling and live, acoustic based performance is central. Bob and the band are primarily engaging with the field of Australian country music (through festivals, media, and self-identification), rather than the folk or bluegrass scenes, which, while related, are distinct fields with different logics, rules and relations.The conceptual framework for this article is indebted to Pierre Bourdieu. In using the term “field” to talk about Australian country music, I understand it as a discrete, relatively autonomous social microcosm, which is located within the social space of Australian society and the broader music industry, yet it is ruled by logics which are “specific and irreducible to those that regulate other fields” (Bourdieu in Bourdieu and Wacquant 97). Australian country music consists of systems of relations, which define the occupants of the field—country musicians, country music stars, or country music fans (to name but a few)—and shape the products and practices of the field. Bob Corbett and the Roo Grass Band are participants in the field of Australian country music, and work to differentiate their position, and gain a monopoly over authority and influence within the field—to be recognised as successful, authentic country music artists (Bourdieu and Wacquant 100). This framework allows analytic space for exploring and understanding a tension between authenticity, as a form of cultural capital, and the commercial imperatives of country music as a popular music form.Family Bands and the Family BusinessThe significance and foregrounded presence of “family” within Australian country music is a result of the history of the field in which family bands have been prominent. The practice of touring with your spouse, children or other kin has been connected to a discourse of the “Family Band” in Australian country music. Slim Dusty and his family, as pioneers in the Australian country music industry, and arguably the most commercially and culturally successful artists in the scene’s history, are held up as an example par excellence of the country music canon, and provide the model for how country music should or could be done as a family. Slim, his wife Joy, daughter Anne Kirkpatrick and other extended family worked as a “family band” touring, performing, songwriting, recording, and being country music artists. As the “first family” Australian country music band (Baker; Ellis) they dominate the social and cultural imaginary of Australian country music. They represent a tradition of family involvement in the business of country music as a way of dealing with the practical realities of touring, providing emotional support and enjoyment, and as a part of a relatively conservative set of values drawn from country life­. These features work together to discursively distance the “family band” from the commercial music industry and imbue integrity and naturalness in those artists’ engagement with the music business. Bob Corbett and the Roo Grass Band is a family band: fiddle player Sue is Bob’s aunty; her partner Michael Stove, Bob’s uncle, was an original member of the Roo Grass Band. But more than that, the band understands themselves as a “family”. Sometimes-drummer in the band, Michael Carpenter, talked at length about the “Roo Grass Family” when I interviewed him, including the affective value he places on those relationships:I love it when Bob says… ‘Michael’s been a part of the Roo Grass family for a long time’ … it’s a very country music thing to say … when Bob says it, it actually means something, there’s a certain level of weight to it, because I know the way he treats his bands, I know the way he treats the people who are involved ... it does make them feel like they are a part of something special and so, and that’s beyond just doing a gig … it kind of creates this sense of loyalty that is important to me.The other members of the band also understand and value their involvement with the band in a similar way, and it spills into the chemistry the band has on stage, and the enjoyment they derive from playing together. The idea of the family band opens out beyond the actual band as well: the “Roo Grass Family” includes friends, fans and others with strong ties and involvement with the band.Practical, on the ground support (both on tour and also at home) offered by family to artists in Australian country music is a significant source of capital for those artists. However, participants also talk about this family help as a chance to spend time together, and couch it within discourses of loyalty, love, fun and commitment. Practices and discourses of small, DIY business are also sutured to discourse of family, as a way of reinforcing the fierce independence from big business and record companies. The fieldwork account at the beginning of this article reveals some of the work done by family on tour for Bob and the band, mainly through the presence of Bob’s mum, Veronica, as defacto tour manager. During the gig Bob offered a series of acknowledgments for the tour. After thanking the audiences and tour sponsors, he moved on to family:Bob: I’d like to thank my aunty Roberta, she came along and helped us on a tour leg … Ah, I’m going to forget people, I’m going to leave the special ones to last … I would like to thank Kirrily personally, but as Sue said, all partners and stuff, so I love you Kiz. But the most special one of all: Mrs Veronica Corbett [loud applause and cheers]. She’s the backbone! Of the tour, so thanks mum, thanks for everything.Veronica: Absolute pleasure Bobby.Bob: It’s been, it’s been a pleasure. You love doing it.Veronica: I love it.Bob: Yeah, you do love doing it, it’s been great, you know. I don’t want to get too, too sentimental, but, um just before dad died, he turned to me and said ‘look after mum’, and I don’t, I don’t look after mum, but in a way, just sharing all these experiences, like, we’re looking after each other, so, thank you for doing that.In this account, I am interested in the ways in which Bob, Veronica and Sue talk about the labour provided by family. There are a number of ways that participants talk about the practice of getting family to help do the work of touring and performing country music, which emerge here, and are consistently used by Bob and the band. It is spoken of in terms of “spending time” with each other, and of loving that time. Discourses of enjoyment and sociality permeate Bob, Veronica, and others’ discussions of the practical reality of people giving up their time to help. This is part of the cultural capital of authenticity: being a professional country music band out on the road is about more than hard slog, making money and cold business; it is an enjoyable experience, underpinned with love. To be authentic, it should be about more than the dollars.While the involvement of family in the activities of the band is discussed and understood as a chance to spend time together, an enjoyable experience, there are also discourses of support and help tied to these practices by those in and around the band. It is often acknowledged as a practical reality that family members are involved in the activities of the band (or in maintaining the home front) as a source of free or cheap labour which makes touring and performing possible. Sue acknowledged the importance of family support to the band, particularly as an independent band, in the interview: Main sources of support? … the management from Toyota and everything … after winning Star Maker, that was really great, so they’ve really helped … and also family … you certainly need that support, because you can’t, you’ve got to get out there and do it, that’s the only way to do it … it’s very personal support in a lot of ways … we’re not at that stage where, we’re not at a bigger level where there’s plenty of money being thrown around by record companies, that sort of support.In acknowledging the role of family at home while the band tours, as well as the “personal support” given to the band, Sue binds the practices of individuals staying at home, minding kids and maintaining home life, to the discourse of family. She is also linking the practices to the band’s “independent” status and the lack of “money being thrown around by record companies” as the reason this support and other on the road, tour based work, is essential. Within Sue’s account here, and at other times during my fieldwork, there was a sense that she saw the need for family support as a sign of inadequacy, a sign that the band had not yet “made it” to the level where the support comes from record companies, and there will be money thrown around to support the activities of the band. This touches on a broader set of discourses that circulate in the country music community about professionalism and amateurism, which are also linked to ideas about family. While the foregrounding of family has value within the field of country music, there is something else going on here. A division is often drawn between “commercial” and “creative” endeavours in Australian country music. By linking practices involving kin and discourses of family, Bob Corbett and the Roo Grass Band position themselves as authentic, or real, grass roots, and with creative freedom, in contrast to being creatively constrained or selling out. Within this division, a reliance on one’s family can be understood in some ways as a rejection of the commercial, business networks of country music. In the case of Sue’s account above there is a sense that it is also a way of negotiating success when you do not have access to a record label or other big business support, which may seem the easier route. Sue’s view differs somewhat from Bob’s in this respect. Bob often expressed pride in the fact that they are “doing it on their own” and boasting an independent DIY model of music business (for example through ticketing, tour organisation and production); a business model that relies on the support of their family, but which is respected and valued within Australian country music. ConclusionArtists such as Bob Corbett and the Roo Grass Band all occupy “positions” in the field of Australian country music, and the discourses of “commercial”, “creative”, and “authentic” all work to categorise artists, and their position in the field. Economic and material circumstances limit, enable or influence the decisions to involve families or not: for Bob, a desire to remain in control of his creative output and career, and the need to maximise income to feed his family makes DIY ticketing, and taking his mum and friends on the road a good choice. But these material factors work with symbolic and cultural factors, in the game of cultural legitimisation about what it is to be a country music artist. The way in which Bob and the band invoked particular discourses of family, loyalty, fun and enjoyment, to talk about the on-the-ground practices of having family involved (or not) in their working lives as musicians is part of the work these bands and artists are doing to represent themselves to the country music community; they are attempting to establish themselves as adequately, legitimately and authentically “country”. In the process they are also shaping what it is to be a country music artist and what is valued within the field—in this case “family”. The constant struggles over what country music is, what is “authentic” country and what represents success, are struggles over the “schemata of classification … which construct social reality” (Bourdieu 20). Bob Corbett and the Roo Grass Band are using strategies in this struggle, in this case the strategies link practices involving kin to discourses of honesty and openness by collapsing public and private, heritage and tradition through the family band, and authenticity, professionalism, and success in the way family support can limit the need to rely on record labels and big business. ReferencesAkenson, James E. “Australia, The United States and Authenticity.” Outback and Urban: Australian Country Music. Ed. Philip Hayward. Gympie, QLD: aicmPress for the Australian Institute of Country Music, 2003. 187–206. Baker, Glen A. “Liner Notes - Annethology: The Best of Anne Kirkpatrick.” July 2010.Barker, Hugh, and Yuval Taylor. Faking It: The Quest for Authenticity in Popular Music. New York: W.W. Norton, 2007.Bourdieu, Pierre. “Social Space and Symbolic Power.” Sociological Theory 7.1 (1989): 14–25. Bourdieu, Pierre, and Loïc J. D. Wacquant, eds. An Invitation to Reflexive Sociology. Chicago: U of Chicago Press, 1992. Carriage, Leigh, and Philip Hayward. “Heartlands: Kasey Chambers, Australian Country Music and Americana.” Outback and Urban: Australian Country Music. Ed. Philip Hayward. Gympie, QLD: aicmPress for the Australian Institute of Country Music, 2003. 113–143. Ellis, Max. “Liner Notes: The Slim Dusty Family Reunion CD.” 2008.Frith, Simon. Music for Pleasure: Essays in the Sociology of Pop. Oxford: Polity Press, 1988.Peterson, Richard A. Creating Country Music: Fabricating Authenticity. Chicago: U of Chicago P, 1997.Sanjek, David. “Pleasures and Principles: Issues of Authenticity in the Analysis of Rock’n’Roll.” Journal of Popular Music Studies 4.2 (1992): 12-21.Sanjek, David. “Blue Moon of Kentucky Rising Over the Mystery Train: The Complex Construction of Country Music.” In Reading Country Music: Steel Guitars, Opry Stars, and Honky-tonk Bars. Ed. Cecelia Tichi. Durham: Duke UP, 1998. 22–44. Smith, Graeme. Singing Australian: The History of Folk and Country Music. North Melbourne, VIC: Pluto Press Australia, 2005. Watson, Eric. Eric Watson’s Country Music in Australia, Volume 1. Pennsylvania: Rodeo Publications, 1982. Watson, Eric. Eric Watson’s Country Music in Australia, Volume 2. Pennsylvania: Rodeo Publications, 1983.

Our thesis is that the city’s ambience is now an unstable dialectic in which we are watchers and watched, mirrored and refracted in a landscape of iPhone auteurs, eTags, CCTV and sousveillance. Embrace ambience! Invoking Benjamin’s spirit, this article does not seek to limit understanding through restriction to a particular theme or theoretical construct (Buck-Morss 253). Instead, it offers snapshots of interactions at the dawn of the postmodern city. That bricolage also engages how people appropriate, manipulate, disrupt and divert urban spaces and strategies of power in their everyday life. Ambient information can both liberate and disenfranchise the individual. This article asks whether our era’s dialectics result in a new personhood or merely restate the traditional spectacle of ‘bright lights, big city’. Does the virtualized city result in ambient anomie and satiation or in surprise, autonomy and serendipity? (Gumpert 36) Since the steam age, ambience has been characterised in terms of urban sound, particularly the alienation attributable to the individual’s experience as a passive receptor of a cacophony of sounds – now soft, now loud, random and recurrent–from the hubbub of crowds, the crash and grind of traffic, the noise of industrial processes and domestic activity, factory whistles, fire alarms, radio, television and gramophones (Merchant 111; Thompson 6). In the age of the internet, personal devices such as digital cameras and iPhones, and urban informatics such as CCTV networks and e-Tags, ambience is interactivity, monitoring and signalling across multiple media, rather than just sound. It is an interactivity in which watchers observe the watched observing them and the watched reshape the fabric of virtualized cities merely by traversing urban precincts (Hillier 295; De Certeau 163). It is also about pervasive although unevenly distributed monitoring of individuals, using sensors that are remote to the individual (for example cameras or tag-readers mounted above highways) or are borne by the individual (for example mobile phones or badges that systematically report the location to a parent, employer or sex offender register) (Holmes 176; Savitch 130). That monitoring reflects what Doel and Clark characterized as a pervasive sense of ambient fear in the postmodern city, albeit fear that like much contemporary anxiety is misplaced–you are more at risk from intimates than from strangers, from car accidents than terrorists or stalkers–and that is ahistorical (Doel 13; Scheingold 33). Finally, it is about cooption, with individuals signalling their identity through ambient advertising: wearing tshirts, sweatshirts, caps and other apparel that display iconic faces such as Obama and Monroe or that embody corporate imagery such as the Nike ‘Swoosh’, Coca-Cola ‘Ribbon’, Linux Penguin and Hello Kitty feline (Sayre 82; Maynard 97). In the postmodern global village much advertising is ambient, rather than merely delivered to a device or fixed on a billboard. Australian cities are now seas of information, phantasmagoric environments in which the ambient noise encountered by residents and visitors comprises corporate signage, intelligent traffic signs, displays at public transport nodes, shop-window video screens displaying us watching them, and a plethora of personal devices showing everything from the weather to snaps of people in the street or neighborhood satellite maps. They are environments through which people traverse both as persons and abstractions, virtual presences on volatile digital maps and in online social networks. Spectacle, Anomie or Personhood The spectacular city of modernity is a meme of communication, cultural and urban development theory. It is spectacular in the sense that of large, artificial, even sublime. It is also spectacular because it is built around the gaze, whether the vistas of Hausmann’s boulevards, the towers of Manhattan and Chicago, the shopfront ‘sea of light’ and advertising pillars noted by visitors to Weimar Berlin or the neon ‘neo-baroque’ of Las Vegas (Schivelbusch 114; Fritzsche 164; Ndalianis 535). In the year 2010 it aspires to 2020 vision, a panoptic and panspectric gaze on the part of governors and governed alike (Kullenberg 38). In contrast to the timelessness of Heidegger’s hut and the ‘fixity’ of rural backwaters, spectacular cities are volatile domains where all that is solid continues to melt into air with the aid of jackhammers and the latest ‘new media’ potentially result in a hypereality that make it difficult to determine what is real and what is not (Wark 22; Berman 19). The spectacular city embodies a dialectic. It is anomic because it induces an alienation in the spectator, a fatigue attributable to media satiation and to a sense of being a mere cog in a wheel, a disempowered and readily-replaceable entity that is denied personhood–recognition as an autonomous individual–through subjection to a Fordist and post-Fordist industrial discipline or the more insidious imprisonment of being ‘a housewife’, one ant in a very large ant hill (Dyer-Witheford 58). People, however, are not automatons: they experience media, modernity and urbanism in different ways. The same attributes that erode the selfhood of some people enhance the autonomy and personhood of others. The spectacular city, now a matrix of digits, information flows and opportunities, is a realm in which people can subvert expectations and find scope for self-fulfillment, whether by wearing a hoodie that defeats CCTV or by using digital technologies to find and associate with other members of stigmatized affinity groups. One person’s anomie is another’s opportunity. Ambience and Virtualisation Eighty years after Fritz Lang’s Metropolis forecast a cyber-sociality, digital technologies are resulting in a ‘virtualisation’ of social interactions and cities. In post-modern cityscapes, the space of flows comprises an increasing number of electronic exchanges through physically disjointed places (Castells 2002). Virtualisation involves supplementation or replacement of face-to-face contact with hypersocial communication via new media, including SMS, email, blogging and Facebook. In 2010 your friends (or your boss or a bully) may always be just a few keystrokes away, irrespective of whether it is raining outside, there is a public transport strike or the car is in for repairs (Hassan 69; Baron 215). Virtualisation also involves an abstraction of bodies and physical movements, with the information that represents individual identities or vehicles traversing the virtual spaces comprised of CCTV networks (where viewers never encounter the person or crowd face to face), rail ticketing systems and road management systems (x e-Tag passed by this tag reader, y camera logged a specific vehicle onto a database using automated number-plate recognition software) (Wood 93; Lyon 253). Surveillant Cities Pervasive anxiety is a permanent and recurrent feature of urban experience. Often navigated by an urgency to control perceived disorder, both physically and through cultivated dominant theory (early twentieth century gendered discourses to push women back into the private sphere; ethno-racial closure and control in the Black Metropolis of 1940s Chicago), history is punctuated by attempts to dissolve public debate and infringe minority freedoms (Wilson 1991). In the Post-modern city unprecedented technological capacity generates a totalizing media vector whose plausible by-product is the perception of an ambient menace (Wark 3). Concurrent faith in technology as a cost-effective mechanism for public management (policing, traffic, planning, revenue generation) has resulted in emergence of the surveillant city. It is both a social and architectural fabric whose infrastructure is dotted with sensors and whose people assume that they will be monitored by private/public sector entities and directed by interactive traffic management systems – from electronic speed signs and congestion indicators through to rail schedule displays –leveraging data collected through those sensors. The fabric embodies tensions between governance (at its crudest, enforcement of law by police and their surrogates in private security services) and the soft cage of digital governmentality, with people being disciplined through knowledge that they are being watched and that the observation may be shared with others in an official or non-official shaming (Parenti 51; Staples 41). Encounters with a railway station CCTV might thus result in exhibition of the individual in court or on broadcast television, whether in nightly news or in a ‘reality tv’ crime expose built around ‘most wanted’ footage (Jermyn 109). Misbehaviour by a partner might merely result in scrutiny of mobile phone bills or web browser histories (which illicit content has the partner consumed, which parts of cyberspace has been visited), followed by a visit to the family court. It might instead result in digital viligilantism, with private offences being named and shamed on electronic walls across the global village, such as Facebook. iPhone Auteurism Activists have responded to pervasive surveillance by turning the cameras on ‘the watchers’ in an exercise of ‘sousveillance’ (Bennett 13; Huey 158). That mirroring might involve the meticulous documentation, often using the same geospatial tools deployed by public/private security agents, of the location of closed circuit television cameras and other surveillance devices. One outcome is the production of maps identifying who is watching and where that watching is taking place. As a corollary, people with anxieties about being surveilled, with a taste for street theatre or a receptiveness to a new form of urban adventure have used those maps to traverse cities via routes along which they cannot be identified by cameras, tags and other tools of the panoptic sort, or to simply adopt masks at particular locations. In 2020 can anyone aspire to be a protagonist in V for Vendetta? (iSee) Mirroring might take more visceral forms, with protestors for example increasingly making a practice of capturing images of police and private security services dealing with marches, riots and pickets. The advent of 3G mobile phones with a still/video image capability and ongoing ‘dematerialisation’ of traditional video cameras (ie progressively cheaper, lighter, more robust, less visible) means that those engaged in political action can document interaction with authority. So can passers-by. That ambient imaging, turning the public gaze on power and thereby potentially redefining the ‘public’ (given that in Australia the community has been embodied by the state and discourse has been mediated by state-sanctioned media), poses challenges for media scholars and exponents of an invigorated civil society in which we are looking together – and looking at each other – rather than bowling alone. One challenge for consumers in construing ambient media is trust. Can we believe what we see, particularly when few audiences have forensic skills and intermediaries such as commercial broadcasters may privilege immediacy (the ‘breaking news’ snippet from participants) over context and verification. Social critics such as Baudelaire and Benjamin exalt the flaneur, the free spirit who gazed on the street, a street that was as much a spectacle as the theatre and as vibrant as the circus. In 2010 the same technologies that empower citizen journalism and foster a succession of velvet revolutions feed flaneurs whose streetwalking doesn’t extend beyond a keyboard and a modem. The US and UK have thus seen emergence of gawker services, with new media entrepreneurs attempting to build sustainable businesses by encouraging fans to report the location of celebrities (and ideally provide images of those encounters) for the delectation of people who are web surfing or receiving a tweet (Burns 24). In the age of ambient cameras, where the media are everywhere and nowhere (and micro-stock photoservices challenge agencies such as Magnum), everyone can join the paparazzi. Anyone can deploy that ambient surveillance to become a stalker. The enthusiasm with which fans publish sightings of celebrities will presumably facilitate attacks on bodies rather than images. Information may want to be free but so, inconveniently, do iconoclasts and practitioners of participatory panopticism (Dodge 431; Dennis 348). Rhetoric about ‘citizen journalism’ has been co-opted by ‘old media’, with national broadcasters and commercial enterprises soliciting still images and video from non-professionals, whether for free or on a commercial basis. It is a world where ‘journalists’ are everywhere and where responsibility resides uncertainly at the editorial desk, able to reject or accept offerings from people with cameras but without the industrial discipline formerly exercised through professional training and adherence to formal codes of practice. It is thus unsurprising that South Australia’s Government, echoed by some peers, has mooted anti-gawker legislation aimed at would-be auteurs who impede emergency services by stopping their cars to take photos of bushfires, road accidents or other disasters. The flipside of that iPhone auteurism is anxiety about the public gaze, expressed through moral panics regarding street photography and sexting. Apart from a handful of exceptions (notably photography in the Sydney Opera House precinct, in the immediate vicinity of defence facilities and in some national parks), Australian law does not prohibit ‘street photography’ which includes photographs or videos of streetscapes or public places. Despite periodic assertions that it is a criminal offence to take photographs of people–particularly minors–without permission from an official, parent/guardian or individual there is no general restriction on ambient photography in public spaces. Moral panics about photographs of children (or adults) on beaches or in the street reflect an ambient anxiety in which danger is associated with strangers and strangers are everywhere (Marr 7; Bauman 93). That conceptualisation is one that would delight people who are wholly innocent of Judith Butler or Andrea Dworkin, in which the gaze (ever pervasive, ever powerful) is tantamount to a violation. The reality is more prosaic: most child sex offences involve intimates, rather than the ‘monstrous other’ with the telephoto lens or collection of nastiness on his iPod (Cossins 435; Ingebretsen 190). Recognition of that reality is important in considering moves that would egregiously restrict legitimate photography in public spaces or happy snaps made by doting relatives. An ambient image–unposed, unpremeditated, uncoerced–of an intimate may empower both authors and subjects when little is solid and memory is fleeting. The same caution might usefully be applied in considering alarms about sexting, ie creation using mobile phones (and access by phone or computer monitor) of intimate images of teenagers by teenagers. Australian governments have moved to emulate their US peers, treating such photography as a criminal offence that can be conceptualized as child pornography and addressed through permanent inclusion in sex offender registers. Lifelong stigmatisation is inappropriate in dealing with naïve or brash 12 and 16 year olds who have been exchanging intimate images without an awareness of legal frameworks or an understanding of consequences (Shafron-Perez 432). Cameras may be everywhere among the e-generation but legal knowledge, like the future, is unevenly distributed. Digital Handcuffs Generations prior to 2008 lost themselves in the streets, gaining individuality or personhood by escaping the surveillance inherent in living at home, being observed by neighbours or simply surrounded by colleagues. Streets offered anonymity and autonomy (Simmel 1903), one reason why heterodox sexuality has traditionally been negotiated in parks and other beats and on kerbs where sex workers ply their trade (Dalton 375). Recent decades have seen a privatisation of those public spaces, with urban planning and digital technologies imposing a new governmentality on hitherto ambient ‘deviance’ and on voyeuristic-exhibitionist practice such as heterosexual ‘dogging’ (Bell 387). That governmentality has been enforced through mechanisms such as replacement of traditional public toilets with ‘pods’ that are conveniently maintained by global service providers such as Veolia (the unromantic but profitable rump of former media & sewers conglomerate Vivendi) and function as billboards for advertising groups such as JC Decaux. Faces encountered in the vicinity of the twenty-first century pissoir are thus likely to be those of supermodels selling yoghurt, low interest loans or sportsgear – the same faces sighted at other venues across the nation and across the globe. Visiting ‘the mens’ gives new meaning to the word ambience when you are more likely to encounter Louis Vuitton and a CCTV camera than George Michael. George’s face, or that of Madonna, Barack Obama, Kevin 07 or Homer Simpson, might instead be sighted on the tshirts or hoodies mentioned above. George’s music might also be borne on the bodies of people you see in the park, on the street, or in the bus. This is the age of ambient performance, taken out of concert halls and virtualised on iPods, Walkmen and other personal devices, music at the demand of the consumer rather than as rationed by concert managers (Bull 85). The cost of that ambience, liberation of performance from time and space constraints, may be a Weberian disenchantment (Steiner 434). Technology has also removed anonymity by offering digital handcuffs to employees, partners, friends and children. The same mobile phones used in the past to offer excuses or otherwise disguise the bearer’s movement may now be tied to an observer through location services that plot the person’s movement across Google Maps or the geospatial information of similar services. That tracking is an extension into the private realm of the identification we now take for granted when using taxis or logistics services, with corporate Australia for example investing in systems that allow accurate determination of where a shipment is located (on Sydney Harbour Bridge? the loading dock? accompanying the truck driver on unauthorized visits to the pub?) and a forecast of when it will arrive (Monmonier 76). Such technologies are being used on a smaller scale to enforce digital Fordism among the binary proletariat in corporate buildings and campuses, with ‘smart badges’ and biometric gateways logging an individual’s movement across institutional terrain (so many minutes in the conference room, so many minutes in the bathroom or lingering among the faux rainforest near the Vice Chancellery) (Bolt). Bright Lights, Blog City It is a truth universally acknowledged, at least by right-thinking Foucauldians, that modernity is a matter of coercion and anomie as all that is solid melts into air. If we are living in an age of hypersocialisation and hypercapitalism – movies and friends on tap, along with the panoptic sorting by marketers and pervasive scrutiny by both the ‘information state’ and public audiences (the million people or one person reading your blog) that is an inevitable accompaniment of the digital cornucopia–we might ask whether everyone is or should be unhappy. This article began by highlighting traditional responses to the bright lights, brashness and excitement of the big city. One conclusion might be that in 2010 not much has changed. Some people experience ambient information as liberating; others as threatening, productive of physical danger or of a more insidious anomie in which personal identity is blurred by an ineluctable electro-smog. There is disagreement about the professionalism (for which read ethics and inhibitions) of ‘citizen media’ and about a culture in which, as in the 1920s, audiences believe that they ‘own the image’ embodying the celebrity or public malefactor. Digital technologies allow you to navigate through the urban maze and allow officials, marketers or the hostile to track you. Those same technologies allow you to subvert both the governmentality and governance. You are free: Be ambient! References Baron, Naomi. Always On: Language in an Online and Mobile World. New York: Oxford UP, 2008. Bauman, Zygmunt. 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