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I suspect that 5-6% figure is based on truck registrations? Dan Murray Vice President, Research American Transportation Research Institute 651-641-6162 [log in to unmask] www.atri-online.org In a message dated 9/9/2010 12:52:44 P.M. Central Daylight Time, [log in to unmask] writes: 5-6% is typically the percent of trucks in total (day + night) traffic. At night, and particularly at interstates, it is larger. Are the 5-6% figures for total or only for night traffic? My sense is that this may have an impact on your analysis. jhv On 9/9/2010 1:21 PM, Dale A Tabat wrote: > All, > Both nationally and in the State of Washington, 22 percent of fatalities > occurring in highway work zones from 2002 to 2009 involved freight trucks. > The average percentage of trucks in Washington State highways is 5-6 > percent so heavy trucks are over represented in work zone fatalities. WSDOT > and agencies are looking to perform root cause analysis of the problem to > focus potential solutions on elements that most significantly contribute to the > problem. > > I am interested in obtaining information related to this research and would > appreciate any work being done or completed. > > Are other states doing analysis in this area? > Are other states interested in this problem? > > Thank you, > Dale A Tabat > Truck Freight Program and Policy Manager > Washington State DOT > [log in to unmask] > > -- Jose Holguin-Veras, Ph.D., P.E. Professor of Civil and Environmental Engineering Director of the Center for Infrastructure, Transportation, and the Environment (CITE) Department of Civil and Environmental Engineering 175 years of Excellence! (1835-2010) 4030 Jonsson Engineering Center Rensselaer Polytechnic Institute 110 Eighth Street Troy, NY 12180-3590 Phone: 518-276-6221 Fax: 518-276-4833 Email (RPI): [log in to unmask] URL: http://www.rpi.edu/~holguj2/