Allen, TX Noise Ordinances: Vehicle Noise (2026)

Texas Transportation Code Sec. 547.605 requires every motor vehicle to have a muffler in good working order that prevents excessive or unusual noise, and explicitly prohibits muffler cutouts, bypasses, and similar devices on vehicles driven on public roads. Allen Police enforce this statewide statute alongside Allen Code Chapter 6, which also prohibits sound systems audible more than 30 feet from the vehicle and unnecessary engine revving in residential areas. Allen's stretch of US-75 (Central Expressway) and SH-121 are common hotspots for loud-exhaust complaints. Texas does not have an ambient dB standard for vehicles at operating speed; officers rely on plain audibility and the muffler rule. Because counties cannot enact noise ordinances in Texas, enforcement is a city-police function inside Allen city limits.