Vehicle Noise: Cedar Park vs Round Rock
How do vehicle noise rules compare between Cedar Park, TX and Round Rock, TX?
Cedar Park, TX
Williamson County
Texas Transportation Code §547.604 requires every motor vehicle to have a muffler in good working order and prohibits muffler cutouts. Cedar Park Article 8.08 exempts a properly-mufflered engine but DOES regulate amplified sound equipment in or attached to vehicles under the 85/70 dBA limits.
View full Cedar Park rules →Round Rock, TX
Williamson County
No data available yet for Round Rock.
Key Facts Comparison
| Fact | Cedar Park | Round Rock |
|---|---|---|
| Muffler rule | Tex. Transp. Code §547.604 (state preempts city) | - |
| Engine noise exemption | Yes, if mufflered & moving on ROW | - |
| Car-stereo limit | 85 dBA day / 70 dBA night (Article 8.08) | - |
| Night vehicle-amp exception? | Never granted | - |
Highlighted rows indicate differences between cities.
Cedar Park FAQ
Is a loud exhaust a Cedar Park violation?
It's a state-law violation (Tex. Transp. Code §547.604) enforced by Cedar Park PD, not a city-code violation. The city ordinance specifically exempts engine noise from a properly mufflered vehicle moving on a public road.
Can I play my car stereo loud in a parking lot?
Not above 85 dBA during the day or 70 dBA after 10pm (11pm Fri/Sat). Sound-producing equipment in vehicles is NOT exempt from Article 8.08.
Round Rock FAQ
No FAQs available.
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