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Safety and Economic Assessment of Converting Two-Way Stop-Controlled Intersections to Roundabouts on High Speed Rural Highways

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  • Zhao, Shanshan
  • Khattak, Aemal J.
  • Thompson, Eric C.

Abstract

This research addressed two questions: “Are roundabouts on rural high-speed roadways safer than two-way stop controlled (TWSC) intersections?” and “What economic benefits can be expected from converting TWSC intersections to roundabouts in terms of safety improvement?” Crash and traffic data on four TWSC intersections that were converted to roundabouts in Kansas were analyzed using the empirical Bayes before-after evaluation method and crash costs were applied to evaluate economic benefits. Analysis showed that fatal, non-fatal, and property-damage-only crashes were reduced by 100%, 76.47%, and 35.49%, respectively. The annual monetary value from this reduction was between $1.0—$1.6 million in 2014 dollars.

Suggested Citation

  • Zhao, Shanshan & Khattak, Aemal J. & Thompson, Eric C., 2015. "Safety and Economic Assessment of Converting Two-Way Stop-Controlled Intersections to Roundabouts on High Speed Rural Highways," Journal of the Transportation Research Forum, Transportation Research Forum, vol. 54(1).
    • Handle: RePEc:ags:ndjtrf:207452
    DOI: 10.22004/ag.econ.207452
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    Cited by:

    1. Sherif Shokry & Shinji Tanaka & Amr M. Wahaballa, 2022. "Cost–Benefit Analysis of Unconventional Arterial Intersection Designs: Cairo as a Case Study," Sustainability, MDPI, vol. 14(24), pages 1-17, December.

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    Public Economics;

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