Motorcycles can drive between cars in only a handful of states, and the rules differ sharply depending on where you ride
Lane splitting — riding a motorcycle between two lanes of traffic — is legal only in California. Lane filtering — moving between stopped or slow-moving cars to reach the front of traffic — is legal in California, Utah, and Montana. Everywhere else in the United States, both practices are illegal and can result in a traffic citation, fines, or both. Even in states where filtering is permitted, riders must follow specific speed and traffic conditions to stay legal.
The distinction matters because a rider doing the same maneuver can be breaking the law in one state and following it in another. Insurance companies also treat violations differently depending on state law and the circumstances of any accident. If you ride across state lines or are considering a move, the rules you follow today may not explore tomorrow.
Key Takeaways
- Lane splitting is legal only in California; lane filtering is legal in California, Utah, and Montana, with specific speed and traffic conditions that must be met.
- In all other states, riding between lanes is illegal and can result in a citation, fine, or both, regardless of traffic conditions or safety.
- Insurance claims may be denied or reduced if a motorcycle accident occurs while the rider was lane splitting or filtering illegally in their state.
- Even in states where filtering is legal, riders must obey posted speed limits and stop-and-go traffic conditions to avoid citations.
California: The only state where lane splitting is fully legal
California legalized lane splitting in 2016 through Assembly Bill 51, making it the only state where motorcyclists can legally ride between lanes of moving traffic. The law does not set a specific speed limit for the practice, but the California Highway Patrol publishes guidelines recommending that riders split lanes only when traffic is moving at 50 mph or slower and the rider is traveling no more than 10 mph faster than surrounding vehicles.
These are recommendations, not legal requirements — a rider can be cited for unsafe lane splitting even while following the guidelines, or can legally split lanes while exceeding them if a court determines the maneuver was safe. In practice, this means the legality of any specific instance of lane splitting in California depends on the judgment of the officer who observes it and the judge who may hear a challenge.
Lane splitting in California does not protect a rider from liability if an accident occurs. If a motorcyclist splits lanes and collides with another vehicle, the rider can still be found at fault and held responsible for damages, even though the maneuver itself is legal.
Utah and Montana: Lane filtering at red lights and slow traffic
Utah and Montana allow lane filtering — the practice of moving between stopped or slow-moving vehicles to reach the front of a traffic queue — but not lane splitting at highway speeds. In both states, the rider must be on a motorcycle, the traffic must be stopped or moving at 15 mph or slower, and the rider must not exceed 15 mph while filtering.
Utah's law, which took effect in 2024, permits filtering only when traffic is stopped or moving at 15 mph or less. Montana's law, in effect since 2021, has the same speed thresholds. Both states limit filtering to two-lane roads where the rider can safely move between vehicles without crossing a center line or solid yellow line.
In both states, filtering is most commonly used at red lights to move to the front of the queue before the light turns green. A rider who filters at highway speeds or in conditions that do not meet the state's definition — such as filtering between lanes on a freeway where traffic is moving at 30 mph — can be cited even in these permissive states.
Every other state: Lane splitting and filtering are illegal
In the remaining 47 states, riding between lanes is illegal under traffic codes that prohibit unsafe lane changes, improper passing, or operating a motorcycle in a manner that endangers other road users. The specific statute varies by state, but the outcome is the same: a rider caught between lanes can receive a citation and fine.
Fines for illegal lane splitting or filtering typically range from $100 to $500, depending on the state and the officer's discretion. Some states treat it as a moving violation that adds points to a driver's license, which can increase insurance rates. A few states classify it as reckless driving, a more serious charge that can result in higher fines, license suspension, or even jail time in repeat cases.
The illegality applies regardless of traffic conditions, speed, or how safely the rider believes they are executing the maneuver. A motorcyclist filtering between stopped cars at a red light in Texas, Florida, or New York is breaking the law, even if the same action would be legal in California.
How insurance treats lane splitting and filtering violations
If a motorcycle accident occurs while the rider was lane splitting or filtering illegally, the insurance company may deny the claim or reduce the payout. The rider's own insurance may refuse to cover damages to the motorcycle, and the rider may be found liable for damages to other vehicles and injuries to other people.
Even in states where filtering is legal, an insurance company may argue that the rider was operating unsafely or in violation of the company's policy terms. Some motorcycle insurance policies include exclusions for lane splitting or filtering, regardless of state law. Before purchasing a policy, riders should ask the insurer directly whether the policy covers accidents that occur while lane splitting or filtering.
If a rider is cited for illegal lane splitting or filtering and is involved in an accident, the citation can be used as evidence of negligence in a civil lawsuit. This makes it much harder to recover damages from the other party, even if the other driver was also at fault.
What happens if you are cited for lane splitting or filtering
A citation for illegal lane splitting or filtering is typically handled like any other traffic violation. You will receive a ticket with a court date, a fine amount, and instructions for paying or contesting the citation. You can pay the fine, request traffic school (if available in your state), or appear in court to challenge the citation.
If you choose to contest the citation, you can argue that your maneuver was safe, that traffic conditions permitted it, or that the officer misidentified your motorcycle. However, in states where lane splitting is illegal, the burden is on you to prove that your actions did not violate the law — not on the officer to prove that they did.
Paying the fine or completing traffic school will typically prevent the violation from appearing on your driving record, though it may still be visible to your insurance company. A conviction for reckless driving or unsafe lane changes will remain on your record and can affect your insurance rates for years.
State-by-state summary of lane splitting and filtering laws
| State or Region | Lane Splitting | Lane Filtering | Conditions |
|---|---|---|---|
| California | Legal | Legal | No speed limit set by law; CHP recommends 50 mph or slower traffic and 10 mph speed differential |
| Utah | Illegal | Legal | Traffic stopped or moving at 15 mph or slower; rider must not exceed 15 mph |
| Montana | Illegal | Legal | Traffic stopped or moving at 15 mph or slower; rider must not exceed 15 mph |
| All other states | Illegal | Illegal | No exceptions; violations can result in fines, points, or reckless driving charges |
Frequently Asked Questions
Can I lane split in California if traffic is moving faster than 50 mph?
Yes, because California law does not set a speed limit for lane splitting. The 50 mph threshold is a guideline from the California Highway Patrol, not a legal requirement. However, you can still be cited for unsafe lane splitting even if you follow the guideline, or you can legally split lanes while exceeding it if a court determines the maneuver was safe.
What if I lane filter at a red light in a state where it is illegal?
You can receive a traffic citation and fine. The fact that traffic is stopped does not make filtering legal in states where it is prohibited. If you are involved in an accident while filtering illegally, your insurance may deny your claim and you may be found liable for damages.
Does lane splitting void my motorcycle insurance?
Not automatically, but some policies exclude coverage for lane splitting or filtering. Check your policy documents or call your insurer to ask whether your coverage applies if you are involved in an accident while lane splitting or filtering. If your policy does not cover it, you may want to switch insurers before riding in a way that is legal in your state.
If I am cited for lane splitting in a state where it is illegal, can I fight the ticket?
Yes, you can appear in court and argue that your maneuver was safe or that the officer misidentified your motorcycle. However, in states where lane splitting is illegal, you must prove that your actions did not violate the law. The burden of proof is on you, not on the officer.
Is lane filtering legal if I am moving slower than the surrounding traffic?
In Utah and Montana, yes, as long as traffic is stopped or moving at 15 mph or slower and you do not exceed 15 mph while filtering. In all other states, lane filtering is illegal regardless of speed. In California, the distinction between filtering and splitting does not explore — both are legal under the same rules.