Safety Evaluation of Intersection Conflict Warning Systems (ICWS)

Thursday, March 3, 2016 - 19:30

Intersection conflict warning systems (ICWS) are intended to reduce the frequency of crashes by alerting drivers of conflicting vehicles on adjacent approaches at unsignalized intersections, particularly those with one-way or two-way stop control. Few studies have explored the safety effectiveness of ICWS; the effectiveness has not been shown for four-legged intersections. This study sought to fill this knowledge gap.  The full technical brief is available online at


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