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原文传递 Safety Belt and Motorcycle Helmet Use in Virginia: The Summer 2003 Update.

题名：	Safety Belt and Motorcycle Helmet Use in Virginia: The Summer 2003 Update.
作者：	Lynn-C.W.; Kennedy-J.L.
关键词：	Motorcycles-; Helmets-; *Seat-belt-usage.;Virginia-; Seat-belts; Safety-belts; Restraint-system-usage; Surveys-; Traffic-safety; Travel-patterns; Accident-prevention; Driver-behavior; Data-collection.
摘要：	The Virginia Transportation Research Council has been collecting safety belt use data in Virginia since 1974. The initial surveys (1974-77 and 1983-86) covered only the four major metropolitan areas of the state (Northern Virginia, Tidewater, Richmond, and Roanoke), with various additions between 1987 and 1992. In 1992, the National Highway Traffic Safety Administration (NHTSA) published the final guidelines for conducting surveys of belt and helmet use in the states. The guidelines required that the selection of survey samples be based on a single probability-based survey design and that only direct observational data be used to demonstrate compliance. The sample design had to include predetermined protocols for (1) determining sample size; (2) selecting sites; (3) selecting alternate sites when necessary; (4) determining which route, lane, and direction of traffic flow were to be observed; (5) collecting the observational data; and (6) beginning and concluding an observation period. As of the 1992 survey, Virginia adopted the NHTSA protocol for its statewide survey.
报告类型：	科技报告