Driver Response to Variable Speed Limits on I-66 in Northern Virginia

Boateng, Richard Atta; Fontaine, Michael D.; Khattak, Zulqarnain H.

doi:10.1061/jtepbs.0000236

Cited by 5 publications

(5 citation statements)

References 12 publications

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“…Field evaluation of VSL systems has been performed to assess the traffic flow performance [1,3,[17][18][19][20][21][22][23][24][25][26][27][28][29], driver's compliance [18,28,30,31], and safety [3,13,22,26,27,32]. Depending on the length of the motorway and available VSL system activation data, the effectiveness of the system is often analyzed in comparative terms of the changes involved in the flow-speed-density relations [1,17,24,33].…”

Section: State Of the Artmentioning

confidence: 99%

“…The comparison is conducted between two singular representations [1,3,17,23], one with the VSL in operation and the other without. Conversely, in cases where ample data is accessible, statistical testing methods are employed, benefiting from both data availability and the enhanced knowledge derived from a richer dataset [18,20,21,23,25,30]. A review of the state of the art concerning application cases as development and evaluation of control algorithms can be found in [2].…”

Section: State Of the Artmentioning

confidence: 99%

“…Robust schemes of effectiveness evaluation need to be applied in different locations to assess the implementation of the VSL further. The assessment of the effectiveness of the system is usually measured by estimation of the total travel time spent [3,17,18,20,23,25,27], higher percentiles of the drivers' speed distribution [1,21,22,26,[30][31][32]34,35], and the changes implied to the capacity [10,24,25,29].…”

Section: State Of the Artmentioning

confidence: 99%

“…Despite most of the field studies concerning safety having proved VSL as an effective control strategy [27,32], the studies related to road traffic performances report controversial results. While the mechanism of congestion propagation seems to be improved in some applications [17,18,[20][21][22][26][27][28][29][30][31], other studies reported increases in travel time and capacity reduction [1,9,18,22,23,26,37]. Further research attention is needed to evaluate the effectiveness of different control algorithms and schemes of drivers' attitudes towards this control strategy.…”

Section: State Of the Artmentioning

confidence: 99%

See 3 more Smart Citations

Statistical and Clustering-Based Assessment of Variable Speed Limits Effects on Motorway Performance from Real-World Observations

Isaenko,

Colombaroni,

Fusco

et al. 2024

Future Transportation

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Variable Speed Limit (VSL) systems aimed at reducing congestion and improving safety performance have been implemented around the world in previous years. However, field studies have shown controversial results regarding traffic performance improvement. This study integrates statistical testing methods and clustering techniques for assessing the effect of a non-mandatory VSL system on traffic flow performances on a 14-km portion of the Padua–Mestre motorway in Italy. Statistical analysis is conducted on the observed speeds, collected for almost one year, to identify any significant differences provided by VSL activation. The changes in global motorway performances induced by the VSL in typical traffic patterns under recurring congestion are assessed using both statistical tests and two specific clustering algorithms, namely K-means and DBSCAN. The results indicate that the VSL system effectively affects the observed speeds and alleviates congested conditions: the observed reduction in mean travel time ranges is around 4% with the VSL system active across various lanes; the standard deviation of vehicular speeds witnessed a decrease of 12% to 20% in the most congested segments, while no notable distinction is observed in traffic flows.

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Section: State Of the Artmentioning

confidence: 99%

Section: State Of the Artmentioning

confidence: 99%

Section: State Of the Artmentioning

confidence: 99%

Section: State Of the Artmentioning

confidence: 99%

See 2 more Smart Citations

Statistical and Clustering-Based Assessment of Variable Speed Limits Effects on Motorway Performance from Real-World Observations

Isaenko,

Colombaroni,

Fusco

et al. 2024

Future Transportation

View full text Add to dashboard Cite

show abstract

“…However, the practical effectiveness of VSL control is restricted by human drivers' heterogeneity [7,[15][16][17]. For example, the different sight distances of drivers result in inconsistent drivers' reactions to the variable speed limit provided by a variable message sign (VMS).…”

Section: Introductionmentioning

confidence: 99%

Safety Effects of Connected and Automated Vehicle-Based Variable Speed Limit Control near Freeway Bottlenecks considering Driver’s Heterogeneity

Shi

Lee

et al. 2022

Journal of Advanced Transportation

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A control strategy using variable speed limit (VSL) is a proven solution to reduce freeway collision risks and improve safety. However, the heterogeneity of human drivers restricts the effectiveness of traditional VSL controls, which may be made up by recent advanced technologies of connected and automated vehicles (CAVs). This study aims to propose a CAV-based VSL control system to address the limitations caused by human drivers on VSL control’s effectiveness. First, the heterogeneity of human drivers is analyzed, and its impact on the safety performance of VSL is examined. Specifically, a microscopic simulation platform is established, and two vehicle dynamic models developed for CAVs and human-driven vehicles (HDVs) are incorporated into the simulation platform. Based on a widely utilized surrogate safety measurement, time-to-collision, its derivative metrics are applied to evaluate collision risks, and the total travel time is used to assess operational efficiency. Extensive simulations are conducted to examine the performance of the proposed CAV-VSL system. The results indicate the following: (1) the heterogeneity of human drivers negatively affects the performance of the VSL; (2) the performance of the proposed control system in a mixed flow can be improved by advanced wireless communication technology; (3) CAVs are able to implement the VSL control strategy effectively resulting in the proactive reduction of the heterogeneity.

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A Bayesian modeling framework for crash severity effects of active traffic management systems

Khattak

Fontaine

2020

Accident Analysis & Prevention

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Driver Response to Variable Speed Limits on I-66 in Northern Virginia

Cited by 5 publications

References 12 publications

Statistical and Clustering-Based Assessment of Variable Speed Limits Effects on Motorway Performance from Real-World Observations

Statistical and Clustering-Based Assessment of Variable Speed Limits Effects on Motorway Performance from Real-World Observations

Safety Effects of Connected and Automated Vehicle-Based Variable Speed Limit Control near Freeway Bottlenecks considering Driver’s Heterogeneity

A Bayesian modeling framework for crash severity effects of active traffic management systems

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