Lane splitting is legal in only three U.S. states
Lane splitting — riding a motorcycle between two lanes of traffic — is legal in California, Utah, and Montana. No other state permits it. In every other state, lane splitting is either explicitly illegal or treated as unsafe driving that can result in a ticket, fine, or both.
The legal status varies by state because traffic laws are set individually. California was the first state to make lane splitting explicitly legal in 2016, after decades of riders doing it without clear legal protection. Utah and Montana followed years later with their own laws. The rest of the country has not moved in this direction, and some states have considered bans specifically to prevent it from becoming common.
If you ride a motorcycle, knowing your state's actual rule matters because the consequences of breaking it go beyond a fine. A lane-splitting ticket can affect your insurance rates, and an accident while lane splitting in a state where it is illegal can complicate a claim or leave you liable for damages.
Key Takeaways
- California, Utah, and Montana are the only states where lane splitting is legal; it is prohibited or unregulated in all others.
- California's law allows lane splitting but requires riders to do it safely and at speeds no more than 10 mph faster than surrounding traffic.
- Utah and Montana permit lane splitting but with different rules about speed and traffic conditions.
- In states where lane splitting is illegal, riders can be cited for unsafe driving, reckless driving, or violating lane-change laws.
- Even where legal, lane splitting increases accident risk and can complicate insurance claims if a collision occurs.
California: The only state with detailed lane-splitting rules
California's law, which took effect in 2016, is the most specific in the country. Riders may split lanes, but only when it is safe to do so and when the motorcycle is traveling no more than 10 mph faster than the surrounding traffic. The law does not define "safe," which means officers and courts interpret it case by case.
California Highway Patrol has published guidelines suggesting that lane splitting is safer when traffic is moving slowly (under 30 mph) and when the speed difference between the motorcycle and other vehicles is small. However, these are recommendations, not legal requirements. A rider can still be cited for unsafe lane splitting even if they follow the 10 mph rule, and a rider can legally split lanes at higher speeds if traffic conditions are truly safe.
If you are stopped for lane splitting in California, the officer must prove the maneuver was unsafe. This gives riders more legal ground to contest a ticket than riders in other states have, but it does not mean you will win. Insurance companies in California treat lane splitting as a higher-risk behavior, and some may charge higher premiums or deny claims if an accident occurs while splitting lanes.
Utah and Montana: Newer laws with different speed limits
Utah legalized lane splitting in 2024, allowing riders to move between lanes when traffic is stopped or moving slowly. The law does not specify a speed threshold the way California does, but it requires that the motorcycle be traveling at a speed that is reasonable and prudent for the conditions. In practice, this means lane splitting is permitted in heavy traffic or congestion, not on open highways.
Montana legalized lane splitting in 2021 with similar language: riders may split lanes when it is safe and when traffic is stopped or moving at low speeds. Montana's law is intentionally vague about what "low speed" means, leaving interpretation to officers and courts. Riders in Montana report that lane splitting is generally tolerated in stop-and-go traffic but not on faster-moving roads.
Both states' laws are newer and less tested in court than California's. This means there is less case law to guide what "safe" and "reasonable" actually mean. If you ride in Utah or Montana and are cited for lane splitting, you may have fewer precedents to point to in your defense than a California rider would.
All other states: Lane splitting is prohibited or unregulated
In the remaining 47 states, lane splitting is either explicitly illegal or falls under broader unsafe-driving laws. Some states have specific statutes that ban it; others do not mention it at all but allow officers to cite riders under reckless-driving, unsafe-lane-change, or improper-passing statutes.
The practical result is the same: a rider caught lane splitting outside California, Utah, or Montana can receive a ticket. Fines vary by state and by the specific charge, but they typically range from $100 to $500 for a first offense. A second offense or an accident while lane splitting can result in higher fines, license suspension, or both.
Some states have considered bans specifically to prevent lane splitting from becoming common. These efforts have not succeeded in most places, but they reflect a policy view that lane splitting is dangerous and should not be permitted. If you ride in a state with no explicit ban, do not assume it is legal — check your state's vehicle code or ask a local traffic attorney.
What happens if you are cited for lane splitting
If you receive a ticket for lane splitting in a state where it is illegal, you have the right to contest it in traffic court. Your defense depends on what charge the officer wrote. If the charge is "unsafe lane change," you can argue that the maneuver was safe given the conditions. If the charge is "reckless driving," the burden is higher — the prosecution must prove you acted with willful disregard for safety.
A traffic attorney in your state can review the ticket and advise whether contesting it is worthwhile. In some cases, an attorney can negotiate a reduction to a lesser charge or a fine reduction. In others, the evidence against you is strong enough that fighting the ticket costs more than paying it.
Beyond the ticket itself, a lane-splitting citation can affect your insurance. Some insurers will not raise your rates for a single traffic ticket, but others will. A ticket for reckless driving or unsafe driving is more likely to trigger a rate increase than a straightforward lane-change violation. If you are in an accident while lane splitting, your insurance company may deny the claim or reduce the payout, especially in a state where lane splitting is illegal.
Insurance and liability when lane splitting
Even in California, where lane splitting is legal, insurance companies treat it as a higher-risk behavior. If you are in an accident while splitting lanes, the insurer will investigate whether the maneuver contributed to the collision. If it did, the company may argue that you were partially at fault and reduce your payout accordingly.
In states where lane splitting is illegal, an insurance company has stronger grounds to deny a claim or refuse to cover damages. If you are hit by another vehicle while splitting lanes in a state where it is prohibited, the other driver's insurance may argue that you were breaking the law and therefore bear full responsibility for the accident. You would then have to sue to recover damages, and a jury might agree with the insurance company's argument.
Some riders purchase additional coverage specifically for accidents that occur while lane splitting, though this is rare and not all insurers offer it. The best approach is to check your policy's language about lane splitting and ask your agent directly whether your coverage applies if you are in an accident while splitting lanes.
Frequently Asked Questions
Is lane splitting legal in my state?
Lane splitting is legal only in California, Utah, and Montana. In all other states, it is either explicitly prohibited or falls under unsafe-driving laws. Check your state's vehicle code or contact your local police department to confirm the rule where you ride.
Can I lane split in California if traffic is moving at 40 mph?
California law allows lane splitting only when the motorcycle is traveling no more than 10 mph faster than surrounding traffic. If traffic is moving at 40 mph, you can split lanes only if you are traveling at 50 mph or less. However, the law also requires that splitting be safe, so even if you meet the speed requirement, an officer can cite you if the maneuver was unsafe.
What is the fine for lane splitting where it is illegal?
Fines vary by state and by the specific charge. A lane-splitting ticket typically results in a fine between $100 and $500, plus court costs. A second offense or a citation for reckless driving can result in higher fines and possible license suspension. Check your state's vehicle code for the exact penalty in your jurisdiction.
Will my insurance cover an accident if I was lane splitting?
It depends on your policy and your state. In California, where lane splitting is legal, insurers may still reduce your payout if lane splitting contributed to the accident. In other states, an insurer may deny the claim entirely if you were lane splitting illegally. Review your policy or contact your agent to understand your coverage.
Did any other states recently legalize lane splitting?
Utah legalized lane splitting in 2024 and Montana in 2021. No other states have legalized it since then. Several states have considered bills to permit or ban lane splitting, but none have passed into law outside these three states.