In June 2002, the North Carolina DOT (NCDOT) opened a three-quarter mile temporary traffic detour around an I-85 bridge construction project in Mecklenburg County. When the detour was opened there were large sections of standing water on the roadway during heavy rains. The standing water was a factor in several hydroplane crashes. The NCDOT decided to install a wet pavement detection system (WPDS) in March, 2003 to help alleviate some of the impacts of the temporary hazardous situation. This report summarized the traffic safety effects on this section of roadway and quantified the differences in crash experience due to deployment of the WPDS.
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