An evaluation of signing to warn of potentially icy bridges. Paper prepared for the 54th Annual Meeting of the Transportation Research Board TRB, Washington, D.C., January 1975.

This study examined driver responses to a slippery bridge deck during periods of possible preferential icing. Study objectives were to examine motorists' general awareness of the hazard and to assess the relative effectiveness of various warning sign treatments. Measures of signing effectiveness were motorists' speeds at critical bridge approach locations.