Development of a dial-in telephone system based on opinions of urban freeway motorists. Paper presented at the 54th Annual Meeting of the Transportation Research Board, Washington, January 1975.

Development work on a dial-in telephone system by using interviews with local residents and reviewing previous work is described. It is recommended that the system incorporates the 6 major traffic descriptors preferred by motorists into messages of less than 60-s duration. The messages should be updated frequently by field information.