U.S. Dept. of transportation, Federal Highways United States Federal Highway Administration. United States National Advisory Commitee on Uniform Traffic Control Devices. text dcu Washington, D.C U.S. Dept. of transportation, Federal Highway Administration For sale by the Supt. of Docs., U.S. G.P.O. 1978- monographic eng 1 v. (looseleaf) ill. (some col.) 25 cm. "This edition developed with the cooperation of the National Advisory Committee on Uniform Traffic Control Devices." "D6.1--1978." "Supersedes D6.1--1971"--T.p. Verso. Traffic signs and signals United States Handbooks, Manuals, etc Señales de tránsito Estados Unidos Revistas, manuales, etc 388.3/12 TD 2.8:T 67/978 VPI 920123 20160527185304.0 30618