AASHTO Publications Standard Specifications for Structural Supports for Highway Signs, Luminaires, and Traffic Signals, 6th Edition, with 2015 Interim Revisions LTS-6-M

These Specifications are applicable to the structural design of supports for highway signs, luminaires, and traffic signals. The Specifications are intended to serve as a standard and guide for the design, fabrication, and erection of these types of supports. Structural supports are categorized as follows: sign support structures, luminaire support structures, traffic signal support structures, and a combination of these structures. The September 2013 errata may be downloaded from the link below.