National Research Council (U.S.). Highway Research Board & National Research Council (U.S.). Transportation Research Board. (1974). Highway capacity and safety: 3 reports prepared for the 53rd annual meeting of the Highway Research Board. Transportation Research Board, National Research Council.

National Research Council (U.S.). Highway Research Board and National Research Council (U.S.). Transportation Research Board. Highway Capacity and Safety: 3 Reports Prepared for the 53rd Annual Meeting of the Highway Research Board. Washington: Transportation Research Board, National Research Council, 1974.

National Research Council (U.S.). Highway Research Board and National Research Council (U.S.). Transportation Research Board. Highway Capacity and Safety: 3 Reports Prepared for the 53rd Annual Meeting of the Highway Research Board. Transportation Research Board, National Research Council, 1974.