Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Dynamic Control Cycle Speed Limit Strategy for Improving Traffic Operation at Freeway Bottlenecks
https://orcid.org/http://orcid.org/0000-0001-6025-190X
https://orcid.org/http://orcid.org/0000-0002-7080-4376
https://orcid.org/http://orcid.org/0000-0002-2191-6187
In recent years, variable speed limit (VSL) has been used to decrease the total travel time and alleviate the traffic congestion on freeway. To improve traffic efficiency, we proposed a novel VSL strategy considering dynamic control cycle in this study. An extension of the cell transmission model was used to depict the traffic characteristics under VSL control, and the VSL strategy was designed to provide multiple control cycles. A probability formula was developed and used to determine the optimal quantity of control cycles in the VSL strategy. An objective optimization function was formulated with the aim of minimizing total travel time. A sensitivity analysis was applied to compare different control strategies under a variety of road bottleneck structures by both the numerical analysis and simulation experiments. The results show that dynamic control cycle VSL strategy outperformed other control scenarios and effectively reduced traffic congestion duration and enhanced the service level of freeway network.
Dynamic Control Cycle Speed Limit Strategy for Improving Traffic Operation at Freeway Bottlenecks
https://orcid.org/http://orcid.org/0000-0001-6025-190X
https://orcid.org/http://orcid.org/0000-0002-7080-4376
https://orcid.org/http://orcid.org/0000-0002-2191-6187
In recent years, variable speed limit (VSL) has been used to decrease the total travel time and alleviate the traffic congestion on freeway. To improve traffic efficiency, we proposed a novel VSL strategy considering dynamic control cycle in this study. An extension of the cell transmission model was used to depict the traffic characteristics under VSL control, and the VSL strategy was designed to provide multiple control cycles. A probability formula was developed and used to determine the optimal quantity of control cycles in the VSL strategy. An objective optimization function was formulated with the aim of minimizing total travel time. A sensitivity analysis was applied to compare different control strategies under a variety of road bottleneck structures by both the numerical analysis and simulation experiments. The results show that dynamic control cycle VSL strategy outperformed other control scenarios and effectively reduced traffic congestion duration and enhanced the service level of freeway network.
Dynamic Control Cycle Speed Limit Strategy for Improving Traffic Operation at Freeway Bottlenecks
https://orcid.org/http://orcid.org/0000-0001-6025-190X
https://orcid.org/http://orcid.org/0000-0002-7080-4376
https://orcid.org/http://orcid.org/0000-0002-2191-6187
In recent years, variable speed limit (VSL) has been used to decrease the total travel time and alleviate the traffic congestion on freeway. To improve traffic efficiency, we proposed a novel VSL strategy considering dynamic control cycle in this study. An extension of the cell transmission model was used to depict the traffic characteristics under VSL control, and the VSL strategy was designed to provide multiple control cycles. A probability formula was developed and used to determine the optimal quantity of control cycles in the VSL strategy. An objective optimization function was formulated with the aim of minimizing total travel time. A sensitivity analysis was applied to compare different control strategies under a variety of road bottleneck structures by both the numerical analysis and simulation experiments. The results show that dynamic control cycle VSL strategy outperformed other control scenarios and effectively reduced traffic congestion duration and enhanced the service level of freeway network.
Dynamic Control Cycle Speed Limit Strategy for Improving Traffic Operation at Freeway Bottlenecks
KSCE J Civ Eng
Zhang, Yaozong (Autor:in) / Ma, Minghui (Autor:in) / Liang, Shidong (Autor:in)
KSCE Journal of Civil Engineering ; 25 ; 692-704
01.02.2021
13 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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