Manual on street traffic signs, signals and markings
By: as prepared by American Engineering council for the National conference on street and highway safety in 1928-1929, with modifications based on experience of the past year and approved by the third National conference on street and highway safety, May 27-28-29, 1930.
Contributors: National conference on street and highway safety (3rd : 1930 : Washington, D.C.)
Published: 1930
Place of publication: Washington, D.C
Language: eng
Number of pages: 63
Subjects: Traffic regulations.
Notes: At head of title: National conference on street and highway safety. Honorable Robert P. Lamont, secretary of commerce, chairman.
"This manual is a revision of and supersedes the 'Report of the Committee of American engineering council on street traffic signs, signals and markings, 1929'."--p. [4]