Notes: Includes bibliographical references (p. 57-64)Notes: Prepared in cooperation with the Michigan Office of Highway Safety Planning and U.S. Department of Transportation, National Highway Traffic Safety AdministrationMichigan Office of Highway Safety Planning, LansingNational Highway Traffic Safety Administration, Washington, D.C.http://deepblue.lib.umich.edu/bitstream/2027.42/1536/4/97337.pdfhttp://deepblue.lib.umich.edu/bitstream/2027.42/1536/2/97337.0001.001.pd