There were two principal objectives of this contract. The first was to develop data collection and data analysis procedures to permit the measurement and evaluation of existing state motor vehicle inspection programs. Only passenger cars were considered. A limited field test was conducted in St. Louis, Missouri, to validate the procedures. The second objective was to design an experiment which relates the presence of a federally recommended PMVI system to accident, fatality, injury and property damage level. The experiment considered exogenous variables (topography, demographics, driver habits, etc.) and control variables (statistical similarity of two groups) as well as the principal comparison of interest—PMVI versus no PMVI. This volume contains an update of the NHTSA motor vehicle identification code. Vehicle production for model years 1974 through 1977 is identified and coded, and presented together with the original identification code. Since the update work was preformed in the first quarter of 1977, later 1977 model productions are not included.
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