Abstract
Risk assessment of hazardous materials movement by trucks is data intensive, and its analysis depends on several data sources and on the quality of the input data. This paper reviews the sources of available data at both federal and state levels for major components of risk assessment. It evaluates the adequacy as well as the structural problems associated with accident, incident and exposure databases. Particular emphasis is placed on accident and incident databases. The differences and similarities in risk assessment results obtained using federal and state data are highlighted. Pennsylvania and Missouri were used as case studies. Also, the differences in the state data available for California, Illinois, and Michigan are discussed. These comparisons show the impact of utilizing national default values for truck accident rates and the probability of hazardous materials releases in performing routing analyses.
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