Better Management for Speed Control in Work Zones
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2006-12-31
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Alternative Title:Better Management of Speed Control in Work Zones
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Edition:Final Report, April 1, 2005 to December 31, 2006
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Abstract:Statistics from the South Carolina Department of Transportation (SCDOT) for incidents between 1998 and 2002 reveal that a leading cause of crashes in work zones is driving too fast for conditions. In April 2005, a team of researchers led by Clemson University’s Transportation Systems Laboratory embarked on research to better manage speed control in work zones. The research tasks included a literature review and survey of states. Based on the literature review and meetings with the project steering committee, a number of devices and strategies were selected for field evaluation. The devices selected were drone radar, changeable message sign with radar (CMR), a speed monitoring display (SMD) with CMS, portable rumble strips, and a novel speed activated sign designed by the researchers. Each of the devices had to be acquired and/or developed for this project and preliminary testing was conducted to identify an acceptable configuration for actual field data collection. After the initial testing, field surveillance of the speed management devices at a variety of different work zone sites on Interstate and State Route highways in South Carolina was done to collect the empirical data needed for evaluation. A statistical analysis of the empirical data was done to quantitatively evaluate the devices. A qualitative evaluation was done as well. Some of the devices were also studied in combination with police enforcement. The results of the analysis show that all of the speed control devices studied during this project has the capability of lowering speeds. This report summarizes the findings of this research and provides several recommendations in choosing a speed control device for a particular work zone application
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