Motorcycle Helmet and Lane-Splitting Laws in New Mexico

In New Mexico, helmets are mandatory only for riders under 18 and lane splitting is illegal. Here is what the statutes actually say, plus the helmet rule that quietly protects your injury claim.

ThatCarHitMe.com Editorial
Jun 5, 2026
6 min read

Motorcycle helmet and lane-splitting laws in New Mexico

If you ride in New Mexico, two questions come up after almost every crash: did the helmet rule apply to me, and does it change what I can recover? The answers are specific to New Mexico, and a couple of them surprise even longtime riders. This page sticks to the state rules. The general ideas behind helmet laws and lane splitting live on our national hub.

Who actually has to wear a helmet

New Mexico is a partial-helmet state. Under NMSA 1978 Section 66-7-356, only operators and passengers under the age of 18 have to wear a helmet on a motorcycle.1 The New Mexico Motor Vehicle Division applies the same under-18 rule to ATVs and other off-highway vehicles.2 Anyone 18 or older can legally ride bare-headed anywhere in the state.

When a helmet is required, it has to be the real thing: securely fastened and built to the U.S. Department of Transportation standard (FMVSS 218), not a novelty shell.1 Autocycles, the enclosed three-wheeled kind, are exempt from the helmet rule.1

One equipment rule applies to every rider, whatever your age. Under Section 66-7-355, if your motorcycle has no state-approved windshield, you have to wear eye protection, meaning a face shield on your helmet, goggles, or safety glasses. The same statute requires you to ride on the permanent seat with your feet on the footrests, and it makes passengers use footrests too. A violation is a penalty assessment misdemeanor.3

The helmet rule that changes your injury claim

Here is the part most riders never hear until they are hurt. The helmet statute says that failing to wear one "shall not constitute contributory negligence."1 Read that twice if you were an adult riding without a helmet when a driver hit you.

New Mexico follows pure comparative negligence, which the state Supreme Court adopted in Scott v. Rizzo in 1981.4 Under that rule your recovery drops by your share of fault, but you can still collect something even if you were mostly to blame. Insurers love to shrink a motorcyclist's claim by arguing the injuries would have been lighter with a helmet. In New Mexico the statute takes that argument away: a legal choice to ride without a helmet cannot be counted against you as fault.1 It does not settle every dispute about how the crash happened, but it removes one of the defense's favorite moves.

Lane splitting and lane filtering are illegal here

New Mexico does not allow lane splitting or lane filtering. No statute authorizes it, and the state's laned-roadway law points the other way. Section 66-7-317 requires any vehicle, a motorcycle included, to be "driven as nearly as practicable entirely within a single lane," and to stay put until the rider has made sure a move can be made safely.5 Threading between two lines of stopped or moving cars breaks that rule.

This is where New Mexico parts ways with some of its neighbors. Arizona legalized limited lane filtering in 2022. Under Arizona Revised Statutes Section 28-903(F), a two-wheeled motorcycle may move between lanes only on a road with at least two lanes in the same direction and a posted limit of 45 mph or less, only when traffic is stopped, and only at 15 mph or below.6 Utah, Montana, and Colorado have passed their own filtering laws. New Mexico has not, and no such bill has become law as of 2026.

If you were filtering or splitting when the crash happened, it affects your claim without automatically ending it. Because of pure comparative negligence, an illegal maneuver can be assigned a percentage of fault that trims your recovery, and you can still collect the rest if the other driver was also negligent.4

Helmets still matter, law or no law

The under-18 cutoff is a legal minimum. It says nothing about what is safe above that age. The National Highway Traffic Safety Administration estimates that helmets are about 37 percent effective at preventing death for motorcycle operators and 41 percent effective for passengers, and it credited helmets with saving 1,872 riders' lives in a single recent year.7 New Mexico's own crash data, compiled for the state Department of Transportation, shows unhelmeted riders dying at higher rates than helmeted ones year after year.8 A 40-year-old on a Sunday ride is free to skip the helmet, but it is worth knowing the numbers first.

How a New Mexico crash claim actually works

If another driver caused your wreck, a handful of state-specific numbers shape what happens next.

You generally have three years from the date of the crash to file a personal injury lawsuit, under NMSA 1978 Section 37-1-8.9 Miss that window and the claim is usually dead, so the deadline matters even while you are still healing.

New Mexico is an at-fault state, and its minimum liability limits are low: 25/50/10, meaning $25,000 per person and $50,000 per crash for injuries, plus $10,000 for property damage, under Section 66-5-215.10 Motorcycle injuries routinely run well past $25,000, which is why uninsured and underinsured motorist coverage matters so much. Insurers have to offer UM/UIM at your liability limits, but you can reject it in writing, and plenty of riders did so without grasping what they were giving up.11 A 2025 bill, HB 97, that would have made UM/UIM impossible to waive died in committee, so the written-rejection option is still the law.11

If the driver at fault works for a government agency, damages are capped. The New Mexico Tort Claims Act limits recovery to $750,000 per occurrence, with sub-caps of $300,000 for medical expenses and $400,000 for other damages, under Section 41-4-19.12 Against a private driver there is no cap on compensatory damages, and punitive damages are on the table when the driver acted with reckless or wanton disregard for your safety, which fits many drunk-driving and distracted-driving crashes. New Mexico bans reading, viewing, or typing a text on a handheld device while driving, and enforces it as a primary offense.13

A few practical steps hold up in almost every case. Get the police crash report, which documents the other driver's fault; you can start that on our New Mexico crash reports page. If your bike was totaled or badly damaged, the repair check is not the finish line, because a repaired motorcycle sells for less afterward, and our New Mexico diminished value guide covers that claim. And if the injuries are serious or the insurer is fighting you, that is the point to find a lawyer through our legal directory.

This article is general information about New Mexico law, not legal advice about your specific situation.

Sources

  1. NMSA 1978 Section 66-7-356, Mandatory use of protective helmets. https://law.justia.com/codes/new-mexico/2018/chapter-66/article-7/section-66-7-356/

  2. New Mexico Motor Vehicle Division, Motorcycle Helmet Law. https://www.mvd.newmexico.gov/helmet-law/

  3. NMSA 1978 Section 66-7-355, Riding on motorcycles. https://law.justia.com/codes/new-mexico/2018/chapter-66/article-7/section-66-7-355/

  4. Scott v. Rizzo, 96 N.M. 682 (1981). https://law.justia.com/cases/new-mexico/supreme-court/1981/96-n-m-682.html

  5. NMSA 1978 Section 66-7-317, Driving on roadways laned for traffic. https://law.justia.com/codes/new-mexico/chapter-66/article-7/part-4/section-66-7-317/

  6. Arizona Revised Statutes Section 28-903(F), Motorcycles (lane filtering). https://www.azleg.gov/ars/28/00903.htm

  7. National Highway Traffic Safety Administration, Traffic Safety Facts: Motorcycles. https://crashstats.nhtsa.dot.gov/Api/Public/ViewPublication/813732.pdf

  8. New Mexico Traffic Research Unit, University of New Mexico Geospatial and Population Studies, for the New Mexico Department of Transportation. https://gps.unm.edu/tru/index.html

  9. NMSA 1978 Section 37-1-8, Actions for personal injury (three-year limit). https://law.justia.com/codes/new-mexico/chapter-37/article-1/section-37-1-8/

  10. NMSA 1978 Section 66-5-215, Minimum liability insurance limits. https://law.justia.com/codes/new-mexico/chapter-66/article-5/part-3/section-66-5-215/

  11. NMSA 1978 Section 66-5-301, Uninsured and underinsured motorist coverage. https://law.justia.com/codes/new-mexico/chapter-66/article-5/part-4/section-66-5-301/

  12. NMSA 1978 Section 41-4-19, Tort Claims Act; damage limits. https://law.justia.com/codes/new-mexico/chapter-41/article-4/section-41-4-19/

  13. NMSA 1978 Section 66-7-374, Use of a mobile communication device while driving. https://law.justia.com/codes/new-mexico/chapter-66/article-7/part-4/section-66-7-374/

About This Guide

Written by: ThatCarHitMe.com Editorial

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