Development of a frost and ice detection system for highway bridges. Paper prepared for presentation at the 52nd Annual Meeting of the Highway Research Board HRB, Washington, D.C., January 25, 1973.

A frost and ice detection system for bridge decks based on detection of the heat fusion of ice is being used experimentally in Iowa. Observation of the operation of five installations during the 1971-72 winter revealed that 57 alarms were genuine, 9 were false, and that on 7 occasions the units failed to detect frost, ice or snow.