To allow for the appropriate use of brakes for the safety of all roadway users, State of Nevada law (Nevada Revised Statute 484D.285) does allow the use of muffled engine brakes. Local city or county ordinances can be put in place to limit their use in certain circumstances. Where such local ordinances are in place, we are happy to review any requests submitted by the local government agency to potentially install highway signs.
The law does require that all engine brakes must be properly muffled. If potential noise pollution is coming from non-muffled, and therefore, illicit, truck brakes, notifying the Nevada Highway Patrol is the best option for enforcement.
Nevada DOT. Safe and Connected.