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Journal articles on the topic 'Turbo roundabout design'

Author: Grafiati

Published: 30 June 2021

Last updated: 29 July 2025

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1

Petru, Jan, and Vladislav Krivda. "An Analysis of Turbo Roundabouts from the Perspective of Sustainability of Road Transportation." Sustainability 13, no. 4 (2021): 2119. http://dx.doi.org/10.3390/su13042119.

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The designs of turbo roundabouts vary among countries and undesirable and potentially dangerous situations can occur for vehicles passing through the roundabout. In this article, we focus on an analysis of one of the problems within sustainable road transportation, i.e., the geometric layout of turbo roundabouts. First, we review the Czech and foreign regulations and describe the design procedures for turbo roundabouts. Studies that have been performed in the Czech Republic and abroad (the Netherlands, Slovenia, Poland, Germany, Hungary, etc.) are described. We evaluate the geometric layout of

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2

Liu, Qiujia, Jiali Deng, Yifan Shen, Wenxin Wang, Zhan Zhang, and Linjun Lu. "Safety and Efficiency Analysis of Turbo Roundabout with Simulations Based on the Lujiazui Roundabout in Shanghai." Sustainability 12, no. 18 (2020): 7479. http://dx.doi.org/10.3390/su12187479.

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Traditional multilane roundabouts have many branch lanes without traffic signs and channelization, which leads to a high tendency for traffic collisions. Turbo roundabouts are a new design that has the potential to reduce lane-change conflicts using canalization to force drivers to keep in specific lanes based on their intended destination. This paper evaluates the safety and efficiency performance of turbo roundabouts for the case of a five-leg roundabout called Lujiazui in Shanghai and provides design and construction guidelines when applying the turbo design. The models for the Lujiazui rou

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3

Sołowczuk, Alicja, and Stanisław Majer. "Design Study for the Construction of Turbo Roundabouts under Constrained Site Conditions." Sustainability 15, no. 17 (2023): 13220. http://dx.doi.org/10.3390/su151713220.

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Turbo-roundabouts are one of the most frequently recommended road junction design options when it comes to increasing traffic capacity and traffic safety. This is in particular true of suburban areas, with dominant traffic flow on the main road and moderate traffic flow on the side road. Other intersections handling local traffic and considerably constricting the availability of space are usually located in the vicinity of such intersections. Another factor contributing to the limited availability of land for construction in these locations is the presence of surrounding residential housing. T

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Salwan, Akshay, Said M. Easa, Narayana Raju, and Shriniwas Arkatkar. "Intersection Sight Distance Characteristics of Turbo Roundabouts." Designs 5, no. 1 (2021): 16. http://dx.doi.org/10.3390/designs5010016.

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A turbo roundabout uses spiral circulatory roads for effectively counteracting the problems faced in modern multilane roundabouts. First developed in 1996, the turbo roundabout has an advantage over the conventional roundabout regarding capacity and safety. Turbo roundabouts are still in the developing phase in North America, but even in the European subcontinent where they exist in large numbers, reliable analytical studies on the critical parameters of roundabout visibility are lacking. Visibility (sight distance) helps to shape the geometry of the intersection and aids in safety. This paper

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5

Hatami, Hadi, and Iman Aghayan. "Traffic Efficiency Evaluation of Elliptical Roundabout Compared with Modern and Turbo Roundabouts Considering Traffic Signal Control." PROMET - Traffic&Transportation 29, no. 1 (2017): 1–11. http://dx.doi.org/10.7307/ptt.v29i1.2053.

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This paper compared the performance of elliptical roundabout with turbo and modern roundabouts. It considers the effects of increasing the central island radius and speed limit on delay and capacity. Three types of roundabouts (modern, turbo and elliptical roundabouts) with different numbers of lanes (single lane, two-lane and three-lane) were designed. Unsignalized and signalized controls were applied for these roundabouts. The robustness of the designed roundabouts was investigated for saturated and unsaturated flow conditions. Based on the obtained results, increasing the central island rad

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6

Wankogere, Elisha Jackson, Valerian Kwigizile, Jun-Seok Oh, and Pavel Ikonomov. "Comparison of Driver Navigation at Turbo Roundabouts and Modern Two-Lane Roundabouts: Simulation Study." Transportation Research Record: Journal of the Transportation Research Board 2637, no. 1 (2017): 89–98. http://dx.doi.org/10.3141/2637-11.

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Roundabouts can be a solution to safety concerns common to conventional intersections. Recently in the United States, there has been an increase in the conversion of problematic intersections to roundabouts to improve their safety. However, there are some important considerations and challenges to make roundabouts safe for all users, especially multilane roundabouts. There may also be challenges for drivers to navigate a newly built or a new type of roundabout. Roundabout features such as pavement markings and signage play an important role in driver navigational performance. This research was

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Elhassy, Zuhair, Hatem Abou-Senna, Khaled Shaaban, and Essam Radwan. "The Implications of Converting a High-Volume Multilane Roundabout into a Turbo Roundabout." Journal of Advanced Transportation 2020 (January 10, 2020): 1–12. http://dx.doi.org/10.1155/2020/5472806.

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With the growing number of vehicles utilizing roads in the city of Doha, Qatar, most intersections, particularly multilane roundabouts, have been facing traffic congestion dilemma, where traffic demand exceeds capacity. A new design for multilane roundabouts, known as a rotor turbo roundabout, was considered as an alternative to an existing highly congested multilane roundabout. The new design features spiral roadway markings and raised lane dividers which prevent maneuvering within the roundabout and eliminate cutting-offs and weavings. This design has achieved high capacity and low delay in

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8

Sołowczuk, Alicja Barbara, and Weronika Benedysiuk. "Design of Turbo-Roundabouts Based on the Rules of Vehicle Movement Geometry on Curvilinear Approaches." Sustainability 15, no. 18 (2023): 13882. http://dx.doi.org/10.3390/su151813882.

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The construction of turbo-roundabouts is an increasingly frequent choice when it comes to improving flow capacity and traffic safety at road intersections. The existing design guidelines, as a rule, give parameters for turbo-roundabouts with approaches set at right angles to each other. The article presents turbo-roundabout design methods, taking into account swept path analyses of the chosen design vehicles when the approach legs are curvilinear and oriented to each other at a non-right angle. Based on the analysis of three different design vehicles, it was proven that their swept paths have

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9

Khitrov, Ihor. "Safety study of a roundabout." Journal of Mechanical Engineering and Transport 18, no. 2 (2024): 175–82. http://dx.doi.org/10.31649/2413-4503-2023-18-2-175-182.

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Roads ensure continuous, safe and convenient movement of vehicles. Intersections play a critical role in the road network in terms of capacity, service level and safety. They are designed in different sizes for different purposes and conditions and have their own defining characteristics that can affect their safety and ease of use. Particular attention is paid to roundabouts - where traffic slows down and becomes a one-way flow around a central island. Additional entrance and roundabout lanes improve transportation efficiency, but they also have an impact on safety. The safety disadvant

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10

Corriere, Ferdinando, Gianfranco Rizzo, and Marco Guerrieri. "Estimation of Air Pollutant Emissions in “Turbo” and in Conventional Roundabouts." Applied Mechanics and Materials 394 (September 2013): 597–604. http://dx.doi.org/10.4028/www.scientific.net/amm.394.597.

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The road pollutant emissions, above all in urban context, are correlated to many infrastructural parameters and to traffic intensity and typology. The research work on road junction geometry, carried out in European research centres, has recently allowed to design new road intersection types which are of undoubted interest, especially in terms of traffic functionality and safety, like the turbo roundabouts (in which right-turn manoeuvres do not conflict with the circulating flow). The main objective of this paper is to propose a model for the estimation the performances and the pollutant emiss

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11

Giuffrè, Orazio, Anna Granà, Sergio Marino, and Fabio Galatioto. "MICROSIMULATION-BASED PASSENGER CAR EQUIVALENTS FOR HEAVY VEHICLES DRIVING TURBO-ROUNDABOUTS." TRANSPORT 31, no. 2 (2016): 295–303. http://dx.doi.org/10.3846/16484142.2016.1193053.

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Due to its geometric design, turbo-roundabouts impose greatest constraints to the vehicular trajectories; by consequence, one can expect a more unfavourable impact of heavy vehicles on the traffic conditions than on other types of roundabouts. The present paper addresses the question of how to estimate Passenger Car Equivalents (PCEs) for heavy vehicles driving turbo-roundabouts. The microsimulation approach used revealed as a useful tool for evaluating the variation of quality of traffic in presence of mixed fleets (different percentages of heavy vehicles). Based on the output of multiple run

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Tollazzi, Tomaž, Goran Jovanović, and Marko Renčelj. "New Type of Roundabout: Dual One-Lane Roundabouts on Two Levels with Right-Hand Turning Bypasses – ’’Target Roundabout’’." PROMET - Traffic&Transportation 25, no. 5 (2013): 475–81. http://dx.doi.org/10.7307/ptt.v25i5.1230.

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The problems of low level traffic safety on multi-lane roundabouts have been resolved in various ways in different countries, usually by using alternative types of roundabouts that reduce the number of conflict points. Alternative types of roundabouts typically differ from 'normal' or 'standard' roundabouts in one or more design elements, as their implementation purposes could also be specific. Today, several different types of roundabouts are already in use ('mini', 'double mini', 'dumb-bell', those 'with joint splitter islands' ('dog-bone'), those 'with a spiralling circular carriageway' ('t

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13

User, Yavuz, Seyitali İlyas, and Gultekin Tinaztepe. "Performance Evaluation of a Hybrid Roundabout Using a Microscopic Simulation." Baltic Journal of Road and Bridge Engineering 16, no. 3 (2021): 47–81. http://dx.doi.org/10.7250/bjrbe.2021-16.532.

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Roundabouts are one of the safest types of intersections. There are a number of roundabout types in literature. Each roundabout type is distinguished by some characteristics. To design more efficient junctions, hybrid roundabouts can be created by combining their required characteristics geometrically. In this study, the safety feature of the turbo junction type and the easing up the traffic density feature of the hamburger junction have been combined. Some geometric parameters and layout details of the proposed hybrid roundabout are given, and its performance was simulated in a signalised 4-l

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14

Tesoriere, Giovanni, Tiziana Campisi, Antonino Canale, and Tedi Zgrablić. "The Surrogate Safety Appraisal of the Unconventional Elliptical and Turbo Roundabouts." Journal of Advanced Transportation 2018 (October 9, 2018): 1–9. http://dx.doi.org/10.1155/2018/2952074.

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Double-lane roundabouts have been created in many European countries over the past few centuries and are now characterized by an unsafe geometric development and by a low sustainability capacity or level. In this regard, new double-lane geometries have been implemented to overcome to these critical points. This article shows a comparison of two nonconventional double-lane roundabout schemes defined as elliptical and turbo. Considering this research on the unsafe and congested conditions for each road schemes at grade, the microsimulation approach allows comparing schemes of intersections not y

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15

Anagnostopoulos, Apostolos, Athanasios Galanis, Fotini Kehagia, Ioannis Politis, Athanasios Theofilatos, and Panagiotis Lemonakis. "Using a Microsimulation Traffic Model and the Vehicle-Specific Power Method to Assess Turbo-Roundabouts as Environmentally Sustainable Road Design Solutions." Future Transportation 5, no. 1 (2025): 4. https://doi.org/10.3390/futuretransp5010004.

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The European Union’s path towards zero carbon dioxide emissions for new passenger vehicles necessitates a transitional period in which conventional vehicles coexist with zero-emission alternatives. This shift requires targeted strategies from engineers and policymakers, particularly in the area of road design, to reduce pollution. This study aims to investigate the environmental benefits of converting a two-lane urban roundabout into a turbo-roundabout through a virtual microsimulation approach using PTV VISSIM. The simulated model was calibrated and validated with real-world daily traffic dat

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16

Ciampa, Donato. "Effectiveness of unconventional roundabouts in the design of suburban intersections." European Transport/Trasporti Europei 80, ET.2020 (2020): 1–16. http://dx.doi.org/10.48295/et.2020.80.6.

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The paper focuses on the use of non-conventional roundabouts, such as turbo-roundabouts and flower-roundabouts, for the reduction of both functional and safety critical issues. The aim is to evaluate the effectiveness of non-conventional design schemes compared to conventional solutions through the implementation of vehicular traffic microsimulation techniques and swept path analysis. The work proposes two case studies in suburban areas characterized by the presence of road intersections affected by high traffic criticality. The study compares the performance in terms of average speed, queues

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17

Mądziel, Maksymilian, Tiziana Campisi, Artur Jaworski, Hubert Kuszewski, and Paweł Woś. "Assessing Vehicle Emissions from a Multi-Lane to Turbo Roundabout Conversion Using a Microsimulation Tool." Energies 14, no. 15 (2021): 4399. http://dx.doi.org/10.3390/en14154399.

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The development of urban strategies for the reduction of environmental impacts and decarbonization requires ongoing monitoring from the local scale and further deployment of actions to improve transport demand (user characteristics and modal choice) and supply (infrastructure and services). The analysis of pollution sources and the evaluation of possible scenarios are preliminary to the mitigation of impacts. In particular, the study of geometrical and functional characteristics of infrastructures through micro-simulation allows understanding of which schemes can support the reduction of emiss

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18

Rassokha, V. I., and N. A. Nikitin. "TRANSFORMATION OF AN ORDINARY RING ROAD INTERSECTION INTO A TURBO RING INTERSECTION: BANDWIDTH COMPARISON." Intelligence. Innovations. Investment, no. 6 (2020): 153–62. http://dx.doi.org/10.25198/2077-7175-2020-6-153.

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In large cities, a situation often arises when roundabout intersections of highways no longer cope with the passage of traffic flows. The main reasons for this problem are the inconsistency of the potential traffic capacity of the roundabout with real traffic flows, as well as the lack of knowledge and skills of drivers on the roundabout carriageway. To reduce the influence of the human factor, various solutions are proposed, but, as practice has shown, ducted roundabouts or «turbo rings» are the most effective. A feature of this configuration of the carriageway is the predictability of driver

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19

Song, Min soo, and Dong min Lee. "A Study on the Estimation of Design Service Traffic Volume for Turbo Roundabout." Journal of The Korea Institute of Intelligent Transport Systems 20, no. 5 (2021): 45–58. http://dx.doi.org/10.12815/kits.2021.20.5.45.

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20

Tumminello, Maria Luisa, Nazanin Zare, Elżbieta Macioszek, and Anna Granà. "Assaying Traffic Settings with Connected and Automated Mobility Channeled into Road Intersection Design." Smart Cities 8, no. 3 (2025): 86. https://doi.org/10.3390/smartcities8030086.

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This paper presents a microsimulation-driven framework to analyze the performance of connected and automated vehicles (CAVs) alongside vehicles with human drivers (VHDs), channeled towards assessing project alternatives in road intersection design. The transition to fully automated mobility is driving the development of new intersection geometries and traffic configurations, influenced by increasing market entry rates (MERs) for CAVs (CAV-MERs), which were analyzed in a microsimulation environment. A suburban signalized intersection from the Polish road network was selected as a representative

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21

Acuto, Francesco, Margarida C. Coelho, Paulo Fernandes, Tullio Giuffrè, Elżbieta Macioszek, and Anna Granà. "Assessing the Environmental Performances of Urban Roundabouts Using the VSP Methodology and AIMSUN." Energies 15, no. 4 (2022): 1371. http://dx.doi.org/10.3390/en15041371.

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In line with globally shared environmental sustainability goals, the shift towards citizen-friendly mobility is changing the way people move through cities and road user behaviour. Building a sustainable road transport requires design knowledge to develop increasingly green road infrastructures and monitoring the environmental impacts from mobile crowdsourced data. In this view, the paper presents an empirically based methodology that integrates the vehicle-specific power (VSP) model and microscopic traffic simulation (AIMSUN) to estimate second-by-second vehicle emissions at urban roundabouts

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22

Leonardi, Salvatore, and Natalia Distefano. "Turbo-Roundabouts as an Instrument for Improving the Efficiency and Safety in Urban Area: An Italian Case Study." Sustainability 15, no. 4 (2023): 3223. http://dx.doi.org/10.3390/su15043223.

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In recent years, numerous turbo-roundabouts have been built in many European countries. To date, there are no turbo-roundabouts in Italy and even the regulations do not provide for their implementation. Turbo-roundabouts are considered the ideal alternative to multi-lane roundabouts as they have numerous advantages. However, they offer better operational performance only for specific traffic flow distributions. This research used the case study of an important and complex urban arterial road in eastern Sicily, Italy, to compare the operational and safety performance between multi-lane roundabo

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23

Kalašová, Alica, Miloš Poliak, Laura Škorvánková, and Peter Fabian. "Optimization of Traffic at Uncontrolled Intersections: Comparison of the Effectiveness of Roundabouts, Signal-Controlled Intersections, and Turbo-Roundabouts." Urban Science 8, no. 4 (2024): 217. http://dx.doi.org/10.3390/urbansci8040217.

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This study focuses on optimizing traffic flow at uncontrolled intersections by comparing the effectiveness of different intersection types: roundabouts, signal-controlled intersections, and turbo-roundabouts. The purpose is to determine which type offers the best solution for enhancing traffic efficiency, reducing delays, and improving safety. The research employs simulation-based modeling to analyze traffic performance under varying traffic conditions. Critical parameters such as vehicle flow rate, average delay time, and capacity are used to assess the performance of each intersection type.

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24

Džambas, Tamara, Saša Ahac, and Vesna Dragčević. "Design of Turbo Roundabouts Based on the Rules of Vehicle Movement Geometry." Journal of Transportation Engineering 142, no. 7 (2016): 05016004. http://dx.doi.org/10.1061/(asce)te.1943-5436.0000850.

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25

Mądziel, Maksymilian, Tiziana Campisi, Artur Jaworski, and Giovanni Tesoriere. "The Development of Strategies to Reduce Exhaust Emissions from Passenger Cars in Rzeszow City—Poland. A Preliminary Assessment of the Results Produced by the Increase of E-Fleet." Energies 14, no. 4 (2021): 1046. http://dx.doi.org/10.3390/en14041046.

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Urban agglomerations close to road infrastructure are particularly exposed to harmful exhaust emissions from motor vehicles and this problem is exacerbated at road intersections. Roundabouts are one of the most popular intersection designs in recent years, making traffic flow smoother and safer, but especially at peak times they are subject to numerous stop-and-go operations by vehicles, which increase the dispersion of emissions with high particulate matter rates. The study focused on a specific area of the city of Rzeszow in Poland. This country is characterized by the current composition of

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26

Sołowczuk, Alicja, and Weronika Benedysiuk. "Problems of ensuring traffic flow on a Basic turbo roundabout with non-standard curvilinear entries (a case study)." Transportation Overview - Przeglad Komunikacyjny, March 3, 2023, 1–19. https://doi.org/10.35117/a_eng_23_03_01.

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Abstract: With ever-increasing motorisation and the desire for greater traffic safety, conventional roundabouts and turbo roundabouts are being designed. Turbo roundabouts provide greater traffic safety than conventional roundabouts due to the segregation of traffic at the entries and on the roadway. In the design of a turbo roundabout, the usual roundabout principles recommended in Dutch guidelines can be applied. However, these apply when the roundabout entrances are directed perpendicularly to each other, which is not always possible. This paper undertakes an analysis of the traffic flow on

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27

Patočka, Miroslav, and Martin Smělý. "MODERN TURBO-ROUNDABOUTS AND THEIR DESIGNING IN THE CZECH REPUBLIC." Jurnal Teknologi 78, no. 5-3 (2016). http://dx.doi.org/10.11113/jt.v78.8507.

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Even though the turbo roundabouts have been designed in the Czech Republic since the beginning of this century, until the middle of 2015, there was no national regulation which would describe the way of their construction. As a result of this, there are only 10 turbo-roundabouts with various widths of design elements and different traffic signs in the Czech Republic now. From this number there are some that even cannot be considered a turbo-roundabout. The aim of this paper is to present the results we gained within the research project and to present readers with the approach to the construct

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28

Elhassy, Zuhair, Hatem Abou-Senna, and Essam Radwan. "Performance Evaluation of Basic Turbo Roundabouts as an Alternative to Conventional Double-Lane Roundabouts." Transportation Research Record: Journal of the Transportation Research Board, February 19, 2021, 036119812199483. http://dx.doi.org/10.1177/0361198121994838.

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Since their introduction in the late 1990s, basic turbo roundabouts have made a great success in several European countries. Researchers, however, have been unable to reach a general consensus on the operational performance advantages and benefits derived from such a novel design of multi-lane roundabouts, as compared with conventional double-lane roundabouts. Those contradictory results could be mostly attributed to wide variations in driver behavior among different traffic environments. This study aims to analyze and evaluate the operational performance of an existing, congested double-lane

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29

Rincón-Numpaque, Nelson, Luis Ángel Moreno-Anselmi, Kelly Andrea Rodríguez-Polo, and Carlos Andrés Gaviria-Mendoza. "Alternatives to Improve Operational Traffic in Roundabouts Using Microsimulation." Respuestas 25, no. 2 (2020). http://dx.doi.org/10.22463/0122820x.2372.

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Roundabout in urban arterials are likely to block roads or generate long queues of vehicles due to the constant changes on urban dynamics near to the interception. Several alternatives to modify the flow pattern or geometry and infrastructure need to be study previously to propose a final design solution of roundabout with traffic issues. In this study, a review of three alternatives to improve the operational traffic are discussed; signalized intersection, turbo-roundabouts and overpass/underpass. In addition, the application of these alternatives is evaluated in a “classic” roundabout locate

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30

"Geometric design of turbo roundabouts." Tehnicki vjesnik - Technical Gazette 24, no. 1 (2017). http://dx.doi.org/10.17559/tv-20151012162141.

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