Alternative sign sequences for work zones on rural highways / prepared for Federal Highway Administration, Offices of Research & Development, Traffic Systems Division.
Alternative sign sequences for work zones on rural highways / prepared for Federal Highway Administration, Offices of Research & Development, Traffic Systems Division.
Cover title."Author: Richard W. Lyle"--1st prelim. p."Social Science Research Institute, University of Maine at Orono; Mat. & Res. Division, Maine DOT...