Relating to the offense of passing certain vehicles on a highway.

HB 3726 amends Texas Transportation Code to clarify when drivers cannot pass certain vehicles on highways. It prohibits passing stationary or slow-moving vehicles displaying specific safety signals, including emergency vehicles, tow trucks, highway maintenance crews, utility service vehicles, municipal waste transporters, toll project vehicles, and vehicles using hazard lamps on the shoulder. The bill directly affects drivers navigating Texas highways by expanding the types of vehicles protected from passing maneuvers. Key provisions define seven vehicle categories that must be treated as stationary obstacles under traffic law, requiring drivers to yield. The law takes effect September 1, 2025.