本规范适用于公路标志、灯具和交通信号灯支架的结构设计。本规范旨在作为此类支架设计、制造和安装的标准和指南。结构支架分为以下几类:标志支撑结构、灯具支撑结构、交通信号支撑结构以及这些结构的组合。

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.