Lane splitting is legal in only three U.S. states

Lane splitting — riding a motorcycle between two lanes of traffic — is legal only in California, Utah, and Montana. California permits it without restriction. Utah allows it only when traffic is stopped or moving at 15 miles per hour or slower. Montana permits it only when traffic is moving at 10 miles per hour or slower. Every other state either bans the practice outright or has no law addressing it, which means it is treated as illegal under existing traffic codes.

The legal status matters because a rider caught lane splitting in a state where it is prohibited can face a traffic citation, fines, and liability if an accident occurs. Insurance companies may also deny a claim if lane splitting contributed to a crash in a state where it is illegal. Understanding your state's specific rule before you ride is essential.

Key Takeaways

  • California is the only state with no speed restriction on lane splitting; riders may do it in any traffic condition.
  • Utah and Montana allow lane splitting only when traffic is stopped or moving at 15 mph or slower (Utah) or 10 mph or slower (Montana).
  • All other states prohibit lane splitting, and riders can receive citations and fines for doing it.
  • Lane splitting bans are enforced under reckless driving or unsafe passing statutes, not always under a specific "lane splitting" law.

California's unrestricted lane splitting rule

California legalized lane splitting in 2016 through Assembly Bill 51, making it the first state to formally permit the practice. The law does not set a speed limit for lane splitting; riders may move between lanes regardless of traffic speed. However, the California Highway Patrol publishes safety guidelines recommending that riders not split lanes when traffic is moving faster than 30 miles per hour and that they limit their speed to 10 miles per hour faster than surrounding traffic.

These guidelines are not law — they are recommendations. A rider who follows them is not protected from liability if an accident occurs, and a rider who ignores them is not automatically at fault. The actual legal standard is that the lane split must be safe and reasonable under the circumstances. A traffic officer can still cite a rider for unsafe lane splitting even in California if the maneuver was reckless.

Utah and Montana's restricted lane splitting laws

Utah passed a lane splitting law in 2024 that took effect on May 14, 2024. The law permits lane splitting only when traffic is stopped or moving at 15 miles per hour or slower. A rider must also stay within a single lane or the space between two lanes and cannot weave repeatedly between lanes. Violators face a traffic infraction.

Montana legalized lane splitting in 2021, effective October 1, 2021. The law allows it only when traffic is moving at 10 miles per hour or slower. Like Utah, Montana's law requires the rider to stay within a single lane or the space between two lanes. The practice is treated as a traffic infraction if the speed threshold is exceeded.

Both states' laws are narrower than California's. They are designed to permit lane splitting in heavy congestion or stop-and-go traffic while prohibiting it on highways or in faster-moving conditions. A rider in either state must monitor traffic speed and stop lane splitting if traffic accelerates above the legal threshold.

How other states treat lane splitting

The remaining 47 states do not have specific lane splitting laws. Instead, lane splitting is prosecuted under existing traffic statutes such as unsafe passing, reckless driving, or improper lane change. The exact charge varies by state and by what the officer observed. A rider cited in these states typically faces a misdemeanor or traffic infraction, depending on the state's code.

Some states, including Texas, Florida, and New York, have proposed lane splitting bills in recent legislative sessions, but none have passed. Proposals often stall due to concerns from law enforcement and insurance groups about safety and enforcement. A few states have studied lane splitting but have not moved toward legalization.

Riders in states without explicit lane splitting laws should assume the practice is illegal. Even if no specific statute uses the words "lane splitting," the maneuver can be charged as an unsafe lane change, improper passing, or reckless operation of a motorcycle.

Why most states prohibit lane splitting

States that ban lane splitting cite safety concerns. Law enforcement and highway safety organizations argue that lane splitting increases the risk of collisions because drivers in cars do not expect motorcycles to appear between lanes. A driver changing lanes or opening a door may not see an approaching motorcycle. Insurance data on lane splitting is limited, but some studies suggest that riders who lane split are more likely to be involved in accidents than those who do not.

Enforcement is another reason states hesitate to legalize lane splitting. Officers must determine whether a rider was lane splitting or straightforward changing lanes, and whether traffic speed met the legal threshold. In states with speed-based rules like Utah and Montana, officers must estimate traffic speed at the moment of the maneuver, which can be difficult and lead to disputes.

A third factor is liability. If a rider lane splits and causes an accident, determining fault becomes complicated. Some states worry that legalizing lane splitting would shift liability questions to courts and insurance companies rather than settling them clearly under traffic law.

What to do if you ride in multiple states

If you ride across state lines, you must follow the laws of the state you are in at the time. A rider who lane splits legally in California cannot do so in Nevada, Arizona, or Oregon, even if they are only a few miles away. The safest approach is to treat lane splitting as illegal everywhere except California, Utah, and Montana, and to follow each state's specific rules in those three states.

Motorcycle insurance policies do not always distinguish between states. If you are cited for lane splitting in a state where it is illegal, your insurer may deny a claim or refuse to renew your policy, even if you have never had an accident. Check your policy's language on traffic violations and ask your agent whether lane splitting in prohibited states would affect your coverage.

Frequently Asked Questions

Can I lane split if traffic is stopped?

In California, yes, without restriction. In Utah and Montana, yes, because stopped traffic meets the speed threshold (0 mph is below 15 mph and 10 mph respectively). In all other states, lane splitting is illegal even in stopped traffic, though enforcement may be less aggressive when traffic is not moving.

What happens if I get a ticket for lane splitting in a state where it is illegal?

You will receive a traffic citation, usually for unsafe passing or reckless driving. The fine amount varies by state, typically ranging from $100 to $500. A conviction may also increase your insurance rates and could affect your driving record for several years.

Does lane splitting void my motorcycle insurance?

Not automatically, but it can. If you are in an accident while lane splitting in a state where it is illegal, your insurer may deny the claim or argue that you were at fault. Review your policy or contact your agent to understand how traffic violations affect your coverage.

Is lane splitting legal in Hawaii or any U.S. territory?

No. Hawaii does not permit lane splitting. U.S. territories follow federal traffic law and do not permit it either. Only California, Utah, and Montana have legalized the practice.

Can I lane split on a highway in California?

Legally, yes — California's law has no highway restriction. However, the California Highway Patrol recommends against lane splitting when traffic is moving faster than 30 mph, and a rider can still be cited for unsafe lane splitting if the maneuver was reckless or caused an accident.