AASHTO has published 2025 Interim Revisions to Standard Specifications for Structural Supports for Highway Signs, Luminaires, and Traffic Signals, 6th Edition (Item Code: LTS-6-I5). The Standard Specifications for Structural Supports for Highway Signs, Luminaires, and Traffic Signals, 6th Edition (Item Code: LTS-6-M), published in 2013, is a standard and a guide for the design, fabrication, and erection of highway signs, luminaires, and traffic signals. These 2025 Interim Revisions include 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.