Vermont Engine & Jake Brake Rules
Vermont tightened up. As of July 1, 2025, any truck or tractor with a compression brake must also run a muffler for it (23 V.S.A. 1309), on top of the general muffler law (1221). That's a muffler requirement, not a statewide ban on the act, and there's an exception for emergency stops. Towns post 'no engine brake' signs in villages and ski or resort areas by ordinance. Keep the retarder muffled, and use it where nothing's posted.
How Vermont handles engine braking
Vermont tightened up. As of July 1, 2025, any truck or tractor with a compression brake must also run a muffler for it (23 V.S.A. 1309), on top of the general muffler law (1221). That's a muffler requirement, not a statewide ban on the act, and there's an exception for emergency stops. Towns post 'no engine brake' signs in villages and ski or resort areas by ordinance. Keep the retarder muffled, and use it where nothing's posted.
What to watch for
- Ban scope: Local / posted
- Where posted & enforced: Villages and ski/resort areas post signs by local ordinance. Since July 1, 2025 the state also requires a muffler on any truck's compression brake (23 V.S.A. 1309), with an exception for emergency stops, so an unmuffled retarder is a state violation anywhere and fails inspection. Enforcement runs through the new statute plus local ordinances.
- Muffler / noise law: Yes, the real legal hook
- Fine: Traffic-violation fine for running a compression brake without a muffler (23 V.S.A. 1309); the exact waiver amount is set by the state fine schedule and not confirmed here. Local posted-zone violations draw a separate municipal fine.
Vermont Engine Brake FAQ
Are engine brakes banned in Vermont?
Where are the "NO ENGINE BRAKE" signs in Vermont?
What is the fine for using an engine brake where it is banned in Vermont?
Reference information for planning, not legal advice. Traffic laws change and this can be out of date, so always confirm the current statute and obey posted signs before you rely on it. Last reviewed July 2026. Source: https://legislature.vermont.gov/statutes/chapter/23/013. See our Terms & Disclaimer.
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