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Dual right-turn lanes in mitigating weaving conflicts at frontage road intersections in proximity to off-ramps

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  • Xiaoming Chen
  • Yi Qi
  • Da Li
  • Yubian Wang

Abstract

At frontage road intersections located downstream of freeway off-ramps, the use of dual right-turn lanes may provide improved weaving environments for right-turning vehicles from the off-ramp and reduce forced merges toward the desired right-turn bay. This paper investigates the safety impacts of the installation of dual right-turn lanes at frontage road intersections. A two-stage approach is used to estimate weaving conflicts as safety surrogates. In the first stage, micro-simulation models are calibrated based on field data to simulate vehicle trajectories. In the second stage, the trajectories are processed to estimate surrogate safety measures and frequency of weaving conflicts under different conditions. The two-stage approach is validated by correlation analysis between predicted weaving conflicts and actual crash rates. The results show that dual right-turn lanes can reduce weaving conflicts significantly compared to single exclusive right-turn lanes, and the safety benefits increase exponentially as weaving distance is reduced.

Suggested Citation

  • Xiaoming Chen & Yi Qi & Da Li & Yubian Wang, 2014. "Dual right-turn lanes in mitigating weaving conflicts at frontage road intersections in proximity to off-ramps," Transportation Planning and Technology, Taylor & Francis Journals, vol. 37(3), pages 307-319, April.
    • Handle: RePEc:taf:transp:v:37:y:2014:i:3:p:307-319
    DOI: 10.1080/03081060.2014.897126
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    Cited by:

    1. Fu Wang & Dengjun Gu & Anqi Chen, 2022. "Analysis of Traffic Operation Characteristics and Calculation Model of the Length of the Connecting Section between Ramp and Intersection," Sustainability, MDPI, vol. 14(2), pages 1-20, January.

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