Lane splitting is legal in only a few states, and illegal in most

Lane splitting — riding a motorcycle between two lanes of traffic — is legal in California, and that is essentially it in the United States. A handful of other states have proposed or studied it, but California remains the only state where you can legally split lanes on public roads. Every other state either explicitly bans it or has no law permitting it, which means it is treated as illegal.

The reason matters: in states where it is not legal, a police officer can stop you, and you can be cited. If you cause an accident while splitting lanes in a state where it is banned, you may be found at fault automatically or face criminal charges depending on the outcome. Insurance companies often deny claims when a rider was breaking traffic law at the time of the crash.

If you ride in multiple states or are considering a move, the legal status of lane splitting should factor into your route planning and riding habits. What is safe and normal in California becomes a traffic violation the moment you cross into Nevada or Arizona.

Key Takeaways

  • California is the only state where lane splitting is explicitly legal; all other states ban it or have no law permitting it.
  • Being cited for lane splitting can result in a traffic ticket, fines, and points on your driving record in states where it is illegal.
  • If you cause an accident while lane splitting illegally, you may be held fully liable even if the other driver was also at fault.
  • Some states are studying lane splitting but have not yet changed their laws; check your state's current statute before riding.

California's lane splitting law and how it works

California legalized lane splitting in 2016 through Assembly Bill 51, making it the first and only state to do so. The law does not define exactly what speed difference or road condition makes splitting legal — instead, it directs the California Highway Patrol to develop guidelines. Those guidelines, published in 2018, recommend that riders split lanes only when traffic is moving at 15 mph or slower and that riders should not exceed the speed of traffic by more than 10 mph.

These are recommendations, not law. A California officer cannot cite you solely for violating the CHP guidelines. However, if you split lanes recklessly — weaving between cars at high speed, for example — you can still be cited under California's reckless driving statute. The legal protection is that splitting lanes itself is not a crime; how you do it is.

Even in California, lane splitting remains controversial. Some riders and safety advocates argue it reduces congestion and keeps motorcycles cooler in traffic. Others, including some law enforcement, say it increases accident risk. Insurance data on the safety of lane splitting remains mixed, and riders should understand that legal does not automatically mean safe.

What happens if you lane split where it is illegal

In states where lane splitting is not legal, you can be pulled over and cited. The specific charge varies by state. Some states list it as unsafe lane change, improper passing, or reckless driving. Others cite it under a general statute against driving in a manner that endangers others. The fine typically ranges from $100 to $500, though this varies by state and by the officer's judgment of how dangerous the behavior was.

A citation for lane splitting adds points to your driving record in most states, which can raise your insurance rates. More seriously, if you cause an accident while splitting lanes illegally, you will almost certainly be found at fault. Some states have comparative negligence rules that might reduce your liability if the other driver was also careless, but you are starting from a position of having broken the law. Your insurance company may deny your claim entirely, leaving you personally responsible for damage and injuries.

States that are studying or considering lane splitting

Several states have introduced bills to study or legalize lane splitting in recent years, including Washington, Oregon, Texas, and Hawaii. As of now, none of these have passed legislation making it legal. Washington came closest: the state passed a bill in 2023 that would have made lane splitting legal under certain conditions, but the governor did not sign it into law.

If you live in or frequently ride through a state that is considering lane splitting, check the current status of any proposed bills before you ride. State legislatures change their laws regularly, and what is illegal today might be legal next year — or vice versa. The safest approach is to assume lane splitting is illegal unless your state explicitly permits it.

How lane splitting affects insurance and liability

Insurance companies treat lane splitting as a high-risk behavior. If you are in an accident and the police report shows you were splitting lanes in a state where it is illegal, your insurer will likely use that as grounds to deny your claim. Even if the other driver caused the accident, the fact that you were breaking traffic law at the time can shift liability entirely to you.

In California, where lane splitting is legal, insurance companies cannot automatically deny a claim based on lane splitting alone. However, they can still investigate whether you were splitting lanes recklessly — at very high speed, for example — and deny the claim on those grounds. Your policy may also have exclusions or higher deductibles for motorcycle riders, regardless of lane splitting.

If you are shopping for motorcycle insurance, be honest with your insurer about where and how you ride. Some insurers offer better rates for riders who commit to not splitting lanes, even in states where it is legal. Others charge more if you split lanes regularly. The cost difference can be significant.

Safe riding practices if you do split lanes legally

If you ride in California or another state where lane splitting is legal, the CHP guidelines offer a practical starting point. Splitting lanes only when traffic is moving at 15 mph or slower and keeping your speed within 10 mph of surrounding traffic reduces the risk that you will not be seen or that you will lose control. Slower traffic gives drivers more time to notice you and adjust, and a smaller speed difference means you have more time to react if a car moves into your path.

Wear bright colors or reflective gear, use your headlight even during the day, and position yourself where drivers are most likely to see you — typically slightly to one side of the lane rather than directly between the center lines. Check your mirrors constantly, and never assume a driver sees you. Even in California, where lane splitting is legal, most drivers are not expecting a motorcycle to pass between lanes, and many will not see you coming.

Frequently Asked Questions

Can I lane split if I have a motorcycle endorsement but not a full license?

Lane splitting legality depends on the state, not on your license type. In California, where it is legal, you can split lanes with a valid motorcycle endorsement. In other states, it is illegal regardless of your license. Always check your state's traffic laws.

What if a police officer in California cites me for lane splitting?

You can be cited if an officer believes you were splitting lanes recklessly — at very high speed or in a way that endangered others. The citation would likely be for reckless driving or unsafe lane change, not for lane splitting itself. You have the right to contest the citation in traffic court.

Does lane splitting void my motorcycle warranty?

Lane splitting does not void your motorcycle's manufacturer warranty. The warranty covers defects in parts and workmanship, not how you ride. However, if you damage your motorcycle while splitting lanes and claim it under warranty, the manufacturer may deny the claim if they determine the damage resulted from misuse.

If I move from California to another state, do I have to stop lane splitting when ready?

Yes. Lane splitting is illegal in every state except California. The moment you cross the state line, you are breaking traffic law if you continue splitting lanes. You should adjust your riding habits before you leave California or as soon as you arrive in your new state.

Are there any other countries where lane splitting is legal?

Yes. Lane splitting is legal in many countries, including the United Kingdom, France, Spain, and most of Europe. If you plan to ride internationally, research the specific traffic laws of each country before you go.