Where lane splitting is legal right now

Lane splitting — riding a motorcycle between two lanes of traffic — is legal in only three U.S. states: California, Utah, and Montana. Each state has different rules about how and when you can do it.

California was the first state to make lane splitting explicitly legal. Utah and Montana passed their own laws more recently. In every other state, lane splitting is either illegal or exists in a legal gray area where it is not clearly permitted or prohibited.

The rules vary significantly between the three states that allow it. What is permitted in California may not be permitted in Utah or Montana. If you ride in multiple states or are planning to move, you need to know the specific rules where you will be riding.

Key Takeaways

  • California, Utah, and Montana are the only states where lane splitting is explicitly legal, and each has different speed and spacing rules.
  • California allows lane splitting at any speed but recommends not exceeding 10 mph faster than surrounding traffic.
  • Utah permits lane splitting only when traffic is moving at 45 mph or slower, and only between the two leftmost lanes.
  • Montana allows lane splitting only when traffic is stopped or moving at 10 mph or less.
  • In all other states, lane splitting is either illegal or not addressed in law, and you can face fines or liability if you do it.

California's lane splitting rules

California legalized lane splitting in 2016 and remains the most permissive state on the practice. There is no speed limit written into the law itself — you can technically lane split at any speed. However, the California Highway Patrol issued guidelines recommending that riders not exceed 10 mph faster than the traffic around them and avoid lane splitting when traffic is moving faster than 30 mph.

These guidelines are not law, but they reflect what law enforcement considers reasonable. Riders who follow them are less likely to face citations. The law does not restrict which lanes you can split between, though riders typically split between the leftmost lanes where there is more room and visibility.

California also requires that you have a valid motorcycle license or endorsement and that your motorcycle is registered and insured. Lane splitting does not change those requirements.

Utah's lane splitting rules

Utah legalized lane splitting in 2024, but with stricter conditions than California. You can only lane split when traffic is moving at 45 mph or slower. You can only split between the two leftmost lanes — not between any two lanes on the road.

This means on a four-lane highway, you can split between lanes 1 and 2 (the left two lanes), but not between lanes 2 and 3 or lanes 3 and 4. On a two-lane road, lane splitting is not permitted because there are no two leftmost lanes to split between.

Utah's law also requires that you do not create an unsafe condition and that you do not exceed 10 mph faster than the traffic you are passing. Like California, you must have a valid motorcycle license and registration.

Montana's lane splitting rules

Montana legalized lane splitting in 2021, but only under very limited circumstances. You can lane split only when traffic is stopped or moving at 10 mph or less. This means you can filter forward at red lights or in heavy, slow-moving traffic, but you cannot lane split on a highway where traffic is flowing at normal speeds.

Montana does not restrict which lanes you can split between, but the 10 mph speed limit on surrounding traffic makes the practical situations quite narrow. Most lane splitting in Montana happens during stop-and-go city driving or at traffic lights.

What happens if you lane split where it is illegal

In states where lane splitting is not legal, you can be cited for unsafe lane changes, reckless driving, or violating specific traffic laws. The fine varies by state and by the specific violation cited, but typically ranges from $100 to $500 or more. Some states treat it as a misdemeanor rather than a traffic infraction, which can result in court appearances and a criminal record.

Beyond the fine, lane splitting where it is illegal can affect your insurance claim if you are in an accident. Insurance companies may deny a claim or reduce your payout if they determine you were lane splitting at the time of the crash. You could also face liability for injuries or damage to other vehicles.

Police enforcement varies by jurisdiction. Some areas actively cite lane splitting; others rarely do. That inconsistency does not make it legal — it only means the risk of being caught varies.

States where lane splitting is in a legal gray area

Some states do not have explicit laws against lane splitting, but they also do not permit it. In these states, a rider could be cited under general traffic laws like "unsafe lane change" or "reckless driving" even though there is no specific lane-splitting statute. This gray area creates uncertainty and risk.

Examples include states where the law is silent on lane splitting but where courts or police have treated it as a violation of existing traffic rules. Riders in these states cannot assume they are legal just because there is no specific prohibition. The safest approach is to treat lane splitting as illegal unless your state explicitly permits it.

Why most states do not allow lane splitting

Most states restrict or prohibit lane splitting because of safety concerns. Riders who split lanes have less room to maneuver if a car changes lanes unexpectedly, and drivers may not see a motorcycle approaching from between lanes. Accidents involving lane splitting can be severe.

Insurance companies and safety organizations have raised concerns about lane splitting, though research on its safety is mixed. Some studies suggest that lane splitting in heavy, slow-moving traffic is relatively safe, while splitting at high speeds is more dangerous. States that have not legalized it tend to cite accident risk as the reason.

Liability is also a factor. If lane splitting causes an accident, determining who is at fault becomes complicated. States that prohibit it avoid this legal complexity by making the practice illegal outright.

Frequently Asked Questions

Can I lane split if I am just moving a few feet forward at a red light?

It depends on your state. In California, Utah, and Montana, you can do this within the rules of each state. In other states, even moving forward a few feet between lanes can be cited as an unsafe lane change. The legality does not change based on distance — it depends on whether your state permits lane splitting at all.

What if I am visiting California from another state — can I lane split there?

Yes. Lane splitting is legal in California regardless of where you are licensed. However, you must follow California's rules and guidelines. If you return to your home state where it is illegal, you cannot lane split there.

Does lane splitting void my motorcycle insurance?

Not automatically, but it can affect a claim. If you are in an accident while lane splitting in a state where it is illegal, your insurance company may deny the claim or reduce your payout. Some insurers have specific clauses about illegal riding practices. Check your policy or contact your insurer to understand how they handle lane splitting claims.

Are there any other states considering legalizing lane splitting?

Several states have introduced bills to legalize lane splitting, but as of now, only California, Utah, and Montana have passed laws. Other states may change their laws in the future, but you should not assume lane splitting is legal anywhere except those three states.

If lane splitting is legal in my state, do I still need to follow traffic laws?

Yes. Lane splitting does not exempt you from other traffic laws. You still must obey speed limits, traffic signals, and rules about safe driving. Lane splitting is only one specific practice that is permitted under certain conditions in three states.