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Partially limited access control design for special-use freeway lanes

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  • Shan, Xiaonian
  • Hao, Peng
  • Boriboonsomsin, Kanok
  • Wu, Guoyuan
  • Barth, Matthew
  • Chen, Xiaohong

Abstract

Most special-use freeway lanes, such as High Occupancy Vehicle (HOV) lanes, have traditionally been designed with either limited access or continuous access control from the adjacent general-purposed (GP) lanes. Studies have shown the advantages and disadvantages of each design in terms of safety, mobility, environment, and enforcement, among other factors. With a focus on improving the operational performance of HOV facilities, this paper proposes a new design called partially limited access control where the continuous access is mostly designated along the freeway to achieve higher travel speed while buffers between the HOV lane(s) and the adjacent GP lanes are strategically placed on selected freeway segments to accommodate higher throughput on those segments. The placement of buffers primarily aims to reduce the impact of HOV cross-weave flow on the capacity of GP lanes. In this research paper, a methodology for determining the location and length of buffers in the partially limited access control has been developed. A case study is performed along a 13-mile section of HOV facility on SR-210 E in Southern California, which is coded and evaluated in traffic microsimulation. The results show that the partially limited access control increases the throughput (represented by total vehicle miles traveled or VMT) and decreases the delay (represented by total vehicle hours traveled or VHT) of the freeway as compared with either the limited access or continuous access control. As a result, the overall efficiency (represented by average travel speed calculated as VMT/VHT) of the freeway with partially limited access HOV facility is 21% and 6% higher than that of the freeway with limited access and continuous access HOV facility, respectively, under the baseline traffic demand.

Suggested Citation

  • Shan, Xiaonian & Hao, Peng & Boriboonsomsin, Kanok & Wu, Guoyuan & Barth, Matthew & Chen, Xiaohong, 2018. "Partially limited access control design for special-use freeway lanes," Transportation Research Part A: Policy and Practice, Elsevier, vol. 118(C), pages 25-37.
    • Handle: RePEc:eee:transa:v:118:y:2018:i:c:p:25-37
    DOI: 10.1016/j.tra.2018.09.002
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    References listed on IDEAS

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    1. Menendez, Monica & Daganzo, Carlos F., 2007. "Effects of HOV lanes on freeway bottlenecks," Transportation Research Part B: Methodological, Elsevier, vol. 41(8), pages 809-822, October.
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    3. Jang, Kitae & Chung, Koohong & Ragland, David R. & Chan, Ching-Yao, 2008. "Comparison of collisions on HOV facilities with limited and continuous access," Institute of Transportation Studies, Research Reports, Working Papers, Proceedings qt7qf6g5fx, Institute of Transportation Studies, UC Berkeley.
    4. Cassidy, Michael J. & Jang, Kitae & Daganzo, Carlos F., 2010. "The smoothing effect of carpool lanes on freeway bottlenecks," Transportation Research Part A: Policy and Practice, Elsevier, vol. 44(2), pages 65-75, February.
    5. Chung, Koohong & Chan, Ching-Yao & Jang, Kitae & Ragland, David R. & Kim, Yong-Hee, 2007. "HOV Lane Configurationsand Collision Distribution on Freeway Lanes – An Investigation of Historical Collision Data in California," Institute of Transportation Studies, Research Reports, Working Papers, Proceedings qt0pm0007b, Institute of Transportation Studies, UC Berkeley.
    6. Jang, Kitae & Chung, Koohong & Ragland, David R & Chan, Ching-Yao, 2009. "Safety Performance of High-Occupancy Vehicle (HOV) Facilities: Evaluation of HOV Lane Configurations in California," Institute of Transportation Studies, Research Reports, Working Papers, Proceedings qt1cm7z3rd, Institute of Transportation Studies, UC Berkeley.
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    Cited by:

    1. Davis, L.C., 2020. "Optimal merging into a high-speed lane dedicated to connected autonomous vehicles," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 555(C).

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