Highway location reference methods. - [Washington] 1974. - 30 p. illus. 28 cm. - Synthesis of highway practice ; 21 . Bibliography: p. 30. ISBN: 0309022045 LCCN: 74003529 Subjects--Topical Terms: Traffic signs and signals.Road markings.Milestones. LC Class. No.: TE228 / .N3 1974 Dewey Class. No.: 625.794