No, there is no law in New Mexico (or anywhere) making cursing while driving illegal as a specific offense. This appears to be another urban myth from “weird laws” lists, similar to debunked tales about pickles or refrigerators, with no basis in state vehicle code or public nuisance statutes.​
Myth Origins
“Dumb law” compilations wrongly attribute swearing bans to various states while driving, but New Mexico’s statutes (NMSA Chapter 66) cover distracted driving, reckless conduct, or disorderly conduct only if it endangers others—no standalone profanity rule exists.​
Actual cases trace to places like Rockville, Maryland’s old municipal code against profane language near streets if audible to passersby.​
Real New Mexico Laws
Drivers face penalties for road rage under aggravated assault (NMSA 30-3-2) or reckless driving if cursing escalates to threats, but muttering expletives alone carries zero penalty.​
Distracted driving bans focus on phones (primary offense since 2014), not speech.​
Public nuisance (NMSA 30-8-8) requires substantial annoyance to others, rarely applied to solo drivers.
SOURCES
[1](https://www.criminaljustice.com/10-totally-bizarre-driving-laws-in-the-us/)
[2](https://blog.nationwide.com/vehicle/vehicle-safety/weird-traffic-laws-by-state/)
[3](https://www.caranddriving.com/feature.aspx?id=1313)
[4](https://dcmdlaw.com/blog/questionable-laws-you-may-not-curse-on-the-street/)
[5](https://living.geico.com/driving/auto/car-safety-insurance/its-the-law-traffic-rules-that-may-surprise-you/)
