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Abstract for presentation (Poster or Podium) with a Paper in the Conference Proceedings

Transportation Safety

Project-Based Crash Analysis for Crash Risk Reduction during Pavement Preservation

Sunday, June 16, 2024

1:15 PM - 2:30 PM ET

Room: Galleria

Primary Author(s)

RB

Ruijie Bian, PhD (she/her/hers)

Research Assistant Professor
Louisiana Transportation Research Center, Louisiana State University
Baton Rouge, LA, United States

Submitter(s)

RB

Ruijie Bian, PhD (she/her/hers)

Research Assistant Professor
Louisiana Transportation Research Center, Louisiana State University
Baton Rouge, LA, United States

Abstract: Low-cost safety improvements, road diets, and project upgrades are three typical solutions to integrate the concept of Complete Streets into pavement preservation programs of state Departments of Transportation (DOTs). Speed management, as a low-cost safety improvement method, could be implemented during pavement preservation to reduce crash risk due to speeding issues. The current study collected a list of preservation projects funded by Louisiana state DOT from 2018 to 2020 and conducted a project-based crash analysis to examine the change of crash rate before and after pavement preservation to evaluate the needs and feasibility of applying speed management. The before-and-after comparison and the regression analysis results revealed a significant increase of crashes after pavement preservation works started, particularly on rural collectors. Radar Speed Feedback Signs (RSFS) were identified as a potential countermeasure to reduce crash risk during pavement preservation on rural collectors. The subsequent benefit-cost analysis results show that implementing speed management within two years after pavement preservation work starts would yield large positive returns on investment as evidenced by a benefit-cost ratio (BCR) over three. The study findings, along with the speed management technology reviewed, are expected to be useful for state DOTs in reducing crash risk related to speeding, improving work zone safety, and better integrating the concept of Complete Streets into their pavement preservation programs.

Learning Objectives:

Attendees can expect to learn the following from this session:

understand the change of crashes before and after pavement preservation
evaluate the needs and feasibility of applying various speed management technics
understand when to apply a speed management technic and its associated Benefits and Costs