Research Papers

Recent Research in Pedestrian Crash Prediction and Countermeasures

Version 1
Date added June 26, 2017
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Category 2017 CARSP XXVII Toronto
Tags Research and Evaluation, Session 2C
Author/Auteur Craig Lyon
Stream/Volet Research and Evaluation

Slidedeck Presentation Only (no paper submitted)

2C_3_Lyon

Abstract

The safety of pedestrians is of a particular concern due to the nature of their vulnerability and typically higher severity crashes. While a significant amount of research has been conducted recently for the development of methods to estimate crash frequency and crash reduction due to countermeasures, the knowledge base for vehicle-pedestrian crashes is limited. This may be due in part to the relative rarity of such crashes making analysis challenging. This presentation discusses two recent research efforts that have been conducted and contribute to filling the knowledge gaps. In the first, Safety Performance Functions (SPFs) for vehicle-pedestrian crashes were developed for roadway segments and intersections for the Region of Waterloo. In the second, Crash Modification Factors (CMFs) were developed using cross-sectional regression modeling for several pedestrian crossing treatments for unsignalized crossings using data from cities across the United States. SPFs were developed for both urban road segments and intersections. CMFs were developed for Rectangular Rapid Flashing Beacons (RRFBs), Pedestrian Hybrid Beacons (PHBs), Pedestrian refuge islands, and Advance Yield or STOP markings and signs. The SPFs developed can be applied for identifying high crash locations, estimating the benefits of contemplated countermeasures and in the evaluation of countermeasures applied using the empirical Bayes before-after methodology. The CMFs can be used to estimate the expected safety benefit of their implementation. Together, the SPFs and CMFs advance the knowledge base related to pedestrian crashes are are useful for practitioners.

Craig Lyon