New Interim Revisions for Structural Support Standards

February 14, 2025

The American Association of State Highway and Transportation Officials recently released new 2025 interim revisions to its 12-year-old structural support standards for highway signs, luminaires or lighting systems, and traffic signals.

[Above image by AASHTO]

The Structural Supports for Highway Signs, Luminaires and Traffic Signals, 6th Edition, includes revisions to the following sections:

  • Section 1: Introduction
  • Section 2: General Features of Design
  • Section 3: Loads
  • Section 5: Steel Design
  • Section 11: Fatigue Design

It is necessary to have these 2025 Interim Revisions – as well as the 2015, 2019, 2020, and 2022 interim revisions – to have all current specification information, AASHTO said.

To order a copy, click here or visit the online AASHTO Store at store.transportation.org and search by the publication’s item code: LTS-6-I5.

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