Tigard, OR Noise from Specific Sources: Delivery Truck Noise (2026)

The Tigard Municipal Code has no delivery-specific noise section in Article V of Chapter 6.02, so delivery trucks are governed by the rules that reach any truck. The sharpest is Section 6.02.440.A: use of exhaust brakes (jake brakes) is prohibited at all times within the city, regardless of noise level. The only carve-outs are use in an emergency and use by a person operating an emergency services vehicle equipped with a muffled compression braking system. Because the ban is not tied to a decibel reading, no measurement is needed to cite it.

Other truck noise falls under Section 6.02.440.B, which makes a violation of sounding a horn or signal device on any truck while in motion except as a danger signal, and of using a vehicle so out of repair or in such a manner as to create loud or unnecessary sounds, grating, grinding or rattling. Subsection B.6 reaches refrigeration units, including those mounted on vehicles. Each of those acts is a violation only when it exceeds the Section 6.02.430 limits: 40 dB from 10 p.m. to 7 a.m. and 50 dB from 7 a.m. to 10 p.m. at a property with a noise-sensitive unit, and 60 dB overnight and 75 dB at other times where the receiving property has none.

For trucks working in a parking lot or loading area open to the public, Section 6.02.450.G exempts sounds from regular vehicular traffic on premises open to the public in compliance with state law. The same subsection says regular vehicle traffic does not include a single vehicle that creates noise in excess of the standard in Section 6.02.430, so one loud truck cannot rely on the exemption. Industrial and construction activities in the City of Tigard have their own 7 a.m. to 8 p.m. exception in Section 6.02.450.F.