United States Department of Transportation
i
Data-Driven Safety Analysis Project Case Study: Systemic Planning Process Benefits Missouri Pavement Project
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2014-10-01
[PDF-1.76 MB]
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Abstract:Historically, the Missouri Department of Transportation (MoDOT) only painted centerline and edge line stripes on routes with 1,000 or greater daily traffic volume. Routes with annual average daily traffic (ADT) of less than 1,000 only received a centerline stripe. As part of a 2008 edge line striping program for High Risk Rural Roads (HRRR), MoDOT performed a systemic safety analysis on all state-owned roadways without a painted edge line, over 18,000 centerline miles. They found that more than two-thirds of severe crashes were occurring on roadways carrying 400 to 1,000 in ADT. MoDOT was interested in improving safety on these routes because they represented a system of roadways that had a large number of the severe crashes. The agency took a proactive safety approach and painted edge lines on all 7,500 miles that fell in this ADT range, even though many of these roads had never had a severe crash. The results so far have shown a 15 percent decrease in total crashes.
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