期刊
TRANSPORTATION RESEARCH PART B-METHODOLOGICAL
卷 98, 期 -, 页码 113-134出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.trb.2016.12.013
关键词
Variable speed limit; Connected vehicle; Freeway bottlenecks; Traffic breakdown; Capacity drop
类别
资金
- National Science Foundation [CMMI 1439795]
- University of Wisconsin-Madison
- Div Of Civil, Mechanical, & Manufact Inn
- Directorate For Engineering [1439795] Funding Source: National Science Foundation
The connected vehicle (CV) technology is applied to develop VSL strategies to improve bottleneck discharge rates and reduce system delays. Three VSL control strategies are developed with different levels of complexity and capabilities to enhance traffic stability using: (i) only one CV (per lane) (Strategy 1), (ii) one CV (per lane) coupled with variable message signs (Strategy 2), and (iii) multiple CVs (Strategy 3). We further develop adaptive schemes for the three strategies to remedy potential control failures in real time. These strategies are designed to accommodate different queue detection schemes (by CVs or different sensors) and CV penetration rates. Finally, probability of control failure is formulated for each strategy based on the stochastic features of traffic instability to develop a general framework to (i) estimate expected delay savings, (ii) assess the stability of different VSL control strategies, and (iii) determine optimal control speeds under uncertainty. Compared to VMS-only strategies, the CV-based strategies can effectively impose dynamic control over continuous time and space, enabling (i) faster queue clearance around a bottleneck, (ii) less restrictive control with higher control speed (thus smoother transition), and (iii) simpler control via only one or a small number of CVs. Published by Elsevier Ltd.
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