United States Department of Transportation
i
Improving Safety through Pennsylvania's Intersection Safety Implementation Plan (ISIP)
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2016-06-01
[PDF-389.07 KB]
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Abstract:According to the 2012 Pennsylvania Strategic Highway Safety Plan (SHSP), nearly 40 percent of all traffic crashes in the State occur at intersections. These crashes account for approximately one-quarter of the total fatalities and major injuries1. In Pennsylvania, intersection safety has been a safety priority since 2006 and has been included in previous iterations of the SHSP. One of the top strategies identified in the SHSP for improving intersection safety is the Intersection Safety Implementation Plan (ISIP). The development of the ISIP began in 2009 when the Federal Highway Administration held a workshop assembling safety personnel from the Pennsylvania Department of Transportation (PennDOT) and Local Technical Assistance Program to identify safety initiatives in the intersection emphasis area of the SHSP. The results of the workshop led to a consensus on a set of countermeasures, deployment levels, and costs. PennDOT released the ISIP in February 2010. The plan included expanding the traditional approach of implementing moderate-cost improvements at the highest crash locations to include the addition of a systemic approach of deploying a large number of low-cost countermeasures at intersections with crashes above a defined threshold.
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