Vehicle Noise: Brentwood vs San Ramon
How do vehicle noise rules compare between Brentwood, CA and San Ramon, CA?
Brentwood and San Ramon have similar restriction levels.
Brentwood, CA
Contra Costa County
Vehicle noise in Brentwood is regulated primarily through California Vehicle Code §27150 (adequate muffler) and §23130 (decibel limits), enforced by Brentwood Police. Modified exhaust, engine revving, and audio systems audible at 50 feet can result in citations and fix-it tickets.
View full Brentwood rules →San Ramon, CA
Contra Costa County
Vehicle noise in San Ramon is regulated by both California Vehicle Code and Municipal Code Chapter B3-40. Modified exhaust systems, engine revving, tire squealing, and horn abuse are prohibited. The city coordinates with CHP on I-680 corridor enforcement and Sheriff deputies handle local streets including Crow Canyon Road and Bollinger Canyon Road.
View full San Ramon rules →Key Facts Comparison
| Fact | Brentwood | San Ramon |
|---|---|---|
| Muffler requirement | CVC §27150 | - |
| Motorcycle limit | 95 dBA (CVC §23130) | - |
| Car limit | 80-86 dBA | - |
| Audio system | Audible at 50 ft = violation | - |
| Typical penalty | Fix-it ticket + $25 fee | - |
| - | - |
Highlighted rows indicate differences between cities.
Brentwood FAQ
Is aftermarket exhaust legal in Brentwood?
Only if it complies with CVC §27150 (adequate muffler, no cutouts/bypasses) and keeps total vehicle noise under the CVC §23130 limits. Straight-pipe and whistle-tip setups are not legal on public streets.
Can I be cited for loud bass from my car stereo?
Yes. CVC §27007 makes it an infraction to operate a sound amplification system that is audible at a distance of 50 feet or more from the vehicle.
San Ramon FAQ
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