Impact of non-freeway rumble strips phase 1.
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2012-06-26
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Edition:Final report; June 1, 2010-June 30, 2012.
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Abstract:In an effort to reduce lane-departure crashes, in 2008 the Michigan Department of Transportation (MDOT) began a ; three-year statewide non-freeway rumble strip installation initiative. This initiative called for the installation of ; milled centerline rumble strips on all rural non-freeway highways with a posted speed limit of 55 mph and a paved ; roadway width greater than 20 ft and shoulder rumble strips on roadways with paved shoulders that were at least 6 ft ; wide. Approximately 5,400 miles of non-freeway roadways were ultimately included in this rumble strip ; installation initiative. As this initiative was believed to be the largest of its kind in the United States at the time, it ; was important for MDOT to evaluate the impacts associated with the rumble strip installations to provide guidance ; for future implementation both within Michigan and other states. The objectives of this study included: Identification and analysis of “Before” traffic crashes; Assessment of impact of rumble strips on driver behavior, bicyclist safety, roadside noise, and shortterm ; pavement performance. ; Several field data collection efforts were undertaken in order to accomplish the objectives. Based on the results of ; the evaluation, it is concluded that rumble strips on high-speed non-freeway highways improves driver performance ; on most highways and traffic scenarios. Vehicles produced higher levels of roadside noise when traveling over the ; rumble strips compared to normal passbys. The rumble strip noise typically did not exceed the roadside noise level ; produced by tractor trailer trucks traveling on normal highways. Finally, centerline rumble strips did not contribute ; to short-term transverse cracking are in asphalt pavements. Three years of “Before” crash data were analyzed to ; identify the target crashes that is expected to be alleviated by the installation of centerline rumble strips on MDOT’s ; high-speed trunkline (non-freeway) system.
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Main Document Checksum:urn:sha256:ac0ff01e7e9482aa4cfa527b93ad454a216a5856c97c4716d919e3d9f327bbb5