Transportation system management and signal systems. - Washington, D.C. : Transportation Research Board, National Research Council, 1985. - iv, 58 p. : ill. - Transporatation research record ; 1021 . Reports prepared for the 64th TRB annual meeting. ISBN: 030903910X (pbk.) : $8.60 Subjects--Topical Terms: Traffic engineering.Traffic signs and signals. LC Class. No.: TE7 HE332 / .H5 no. 1021 Dewey Class. No.: 380.5 s 388.3/122�19