United States Department of Transportation
i
Prioritizing High Collision Concentration Locations (HCCLs) identified using Pedestrian Safety Monitoring Report Tool
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2019-08-24
[PDF-2.27 MB]
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Alternative Title:Prioritizing HCCLs identified using Pedestrian Safety Monitoring Report Tool [cover title]
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Edition:Final Report
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Abstract:The Pedestrian Safety Improvement Program is an effort of the California Department of Transportation (Caltrans) to identify and address problems with regard to pedestrian safety in California, with the long-term goal of substantially reducing pedestrian fatalities and injuries in California. The research presented in this report explores different crash frequency-based prioritization techniques to provide more robust metrics to identify high collision concentration locations. In particular, they evaluate methodologies to statistically quantify the presence of recurring crash patterns, as well as methods to mitigate regression-to-the-mean phenomena in the absence of safety performance functions. These comparisons were conducted using both empirical and simulated datasets. The empirical findings indicate that metrics proposed for pattern recognition may potentially mimic pattern identification process of investigators. However, the use of simulation reveals that the accuracy of these methods may depend on the amount of overdispersion present in the crash population, which needs further exploration.
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