The synthesis will be of interest to highway designers, administrators, and others concerned with highway safety. Information is presented on practices used by agencies to identify hazardous highway elements and to set priorities for improving those elements. Almost all highway agencies use accident data to identify high-accident locations on highways. In some cases, however, accidents may be associated with elements of the highway environment (roadside obstacles, geometrics, pavement friction, etc.) that may not be at high-accident locations but may be associated with high-accident frequency system-wide. The report of the Transportation Research Board explains what agencies are doing to identify those elements that may be hazardous.
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