Optimising total entry delay at roundabouts with unbalanced flow: a dynamic strategy for smart metering

Duan, Yuzhou; Qu, Xiaobo; Easa, Said M.; Yan, Yonggao

doi:10.1049/iet-its.2018.5180

Cited by 8 publications

(7 citation statements)

References 30 publications

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“…Research on traffic flow optimization, particularly concerning roundabouts, predominantly concentrates on evaluating the efficacy of novel assessment techniques integrating intelligent technologies into road infrastructure to enhance mobility [100][101][102][103][104][105][106][107][108][109]. In this regard, Elmanaa et al [100] developed a compact system for real-time processing of camera images, showing promise when applied to a three-leg roundabout for traffic surveillance, especially in resource-limited settings.…”

Section: Optimization Of Traffic Flow At Roundabouts In the Transitio...mentioning

confidence: 99%

“…By analyzing vehicle exit probability distribution in a roundabout, they showcased the advantages of context-aware knowledge dissemination over contextindependent methods, including improved precision, reduced delays, and lower overhead. Duan et al [102] established a criterion for implementing metering at roundabouts using a signal-based strategy. Through a case study, they demonstrated that this approach reduced delay by up to about 26 percent.…”

Section: Optimization Of Traffic Flow At Roundabouts In the Transitio...mentioning

confidence: 99%

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Insights into Simulated Smart Mobility on Roundabouts: Achievements, Lessons Learned, and Steps Ahead

Tumminello,

Macioszek,

Granà

2024

Sustainability

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This paper explores the domain of intelligent transportation systems, specifically focusing on roundabouts as potential solutions in the context of smart mobility. Roundabouts offer a safer and more efficient driving environment compared to other intersections, thanks to their curvilinear trajectories promoting speed control and lower vehicular speeds for traffic calming. The synthesis review supported the authors in presenting current knowledge and emerging needs in roundabout design and evaluation. A focused examination of the models and methods used to assess safety and operational performance of roundabout systems was necessary. This is particularly relevant in light of new challenges posed by the automotive market and the influence of vehicle-to-vehicle communication on the conceptualization and design of this road infrastructure. Two case studies of roundabouts were analyzed in Aimsun to simulate the increasing market penetration rates of connected and autonomous vehicles (CAVs) and their traffic impacts. Through microscopic traffic simulation, the research evaluated safety and performance efficiency advancements in roundabouts. The paper concludes by outlining areas for further research and evolving perspectives on the role of roundabouts in the transition toward connected and autonomous vehicles and infrastructures.

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Section: Optimization Of Traffic Flow At Roundabouts In the Transitio...mentioning

confidence: 99%

Section: Optimization Of Traffic Flow At Roundabouts In the Transitio...mentioning

confidence: 99%

Insights into Simulated Smart Mobility on Roundabouts: Achievements, Lessons Learned, and Steps Ahead

Tumminello,

Macioszek,

Granà

2024

Sustainability

View full text Add to dashboard Cite

show abstract

“…Roundabouts perform well when the flows from all approaches are balanced, with platoons present in the circulating flow, and vehicles from each approach can enter the roundabout. This is because the yield rule limits the approach flows to depend on the circulating flow, and the overall roundabout performance depends on both the circulating flow and the approach flows [13][14][15]18,[22][23][24][25][26][27][28][29].…”

Section: Literature Reviewmentioning

confidence: 99%

“…Adaptive strategies, which are a modified version of actuated control, use available data to predict the cycle length required for current traffic conditions. Detectors are placed on stop lines, right-turn sensors, slip lane sensors, and advanced detection sensors, on every road in a signalized network [16,19,28,30]. Traditional traffic light systems rely on hard-programmed delays, with no consideration for real-time traffic flow, leading to congestion [34,35].…”

Section: Literature Reviewmentioning

confidence: 99%

“…However, the use of actuated signal control has not been successful in handling traffic flow in roundabouts, leading researchers to focus on studying roundabout capacity and adaptive signal control [18,26,32,36,37]. Moreover, the adaptive signal control system, specifically designed for roundabouts, was developed to improve their efficiency [28,38]. Signalized roundabouts are equipped with advanced loop detectors and traffic signals to minimize vehicle queuing lengths, especially on the dominant approach, when unbalanced traffic flow conditions occur.…”

Section: Literature Reviewmentioning

confidence: 99%

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Modeling of Queue Detector Location at Signalized Roundabouts via VISSIM Micro-Simulation Software in Amman City, Jordan

Assolie,

Sukor,

Khliefat

et al. 2023

Sustainability

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The growing number of vehicles in Jordan has contributed to traffic congestion, particularly at roundabouts. Roundabouts deflect high volumes of traffic flow. To improve the performance of roundabouts, it is necessary to consider the impact of all components on traffic conditions, especially delay, queue length, and level of service (LOS), to reduce congestion and enhance efficiency and sustainability, etc. This study aims to (a) identify the optimal queue detector locations on all approaches at two selected roundabouts in Amman, Jordan, using micro-simulation (VISSIM) supported by programming (Python) software, and (b) validate the simulated models with the best LOS. Traffic and geometric data of roundabouts (Prince Faisal Bin al-Hussein, fifth; and Prince Rashid Bin Hassan, sixth roundabouts) were used for simulation purposes. The queue detector (across 15 distinct scenarios at various distances) and standard (base scenario, 50 m from the stop line) locations were assessed for optimal placement. The model validation was made based on all scenarios including signalized and non-signalized roundabouts. The best-case scenario for queue detector location was determined based on the highway capacity manual (HCM) criteria for measurement of effectiveness (MOE) at roundabouts. The optimal location was measured based on the duration of traffic delay (seconds), average queue length (m), and LOS. The optimal queue detector’s location was observed to be 97 m from the roundabout stop line. It can reduce the traffic delay (or speed up the traffic flow) by 85.25%. The average queue length can be reduced up to 76.76%. The LOS F status on the selected roundabouts can be improved to LOS D. Overall, the application of adaptive signal and queue detectors in appropriate locations at all roundabout approaches is crucial to improve imbalanced traffic flow while reducing delays.

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Traffic Flow Model of the Weaving Section in Signalized Roundabouts

Zhan

Song

Zhang

et al. 2022

Smart Transportation Systems 2022

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Optimising total entry delay at roundabouts with unbalanced flow: a dynamic strategy for smart metering

Cited by 8 publications

References 30 publications

Insights into Simulated Smart Mobility on Roundabouts: Achievements, Lessons Learned, and Steps Ahead

Insights into Simulated Smart Mobility on Roundabouts: Achievements, Lessons Learned, and Steps Ahead

Modeling of Queue Detector Location at Signalized Roundabouts via VISSIM Micro-Simulation Software in Amman City, Jordan

Traffic Flow Model of the Weaving Section in Signalized Roundabouts

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