Standard specifications for structural supports for highway signs, luminaries and traffic signals / 
prepared by the AASHTO Subcommittee on Bridges and Structures. 
 - 94 pages :  illustrations, maps  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Traffic signs and signals--Break-away supports--Standards.<br/>Poles (Engineering)--Standards.<br/>Lampposts--Standards.
<br/><br/><label>LC Class. No.: </label>TE180 AME