Lane splitting is riding a motorcycle between two lanes of traffic moving in the same direction
Lane splitting — sometimes called lane filtering when done at low speeds or at traffic lights — means steering a motorcycle between two lanes of cars traveling the same way. The rider passes vehicles without changing lanes in the traditional sense; instead, they use the space between lanes as a temporary path.
Whether you can do this legally depends entirely on your state. California is the only state that explicitly permits lane splitting under specific conditions. Most other states prohibit it, and a few have no clear law either way. Even where it is legal, there are usually rules about speed, traffic conditions, and how far apart the lanes must be.
The distinction between lane splitting and lane filtering matters in some places. Lane filtering typically refers to moving between stopped or very slow traffic, often at red lights. Lane splitting usually means passing moving traffic at higher speeds. Some states allow one but not the other.
Key Takeaways
- California is the only state with explicit legal permission for lane splitting, which requires the motorcycle to move at a speed no more than 10 miles per hour faster than surrounding traffic.
- Most other states treat lane splitting as illegal lane changing and can result in a traffic citation, fine, or both.
- Lane filtering (moving between stopped cars at a light) is legal in a small number of states including Utah and Arizona, but is prohibited in most.
- Even in states without a specific law against lane splitting, insurance companies may deny claims if an accident occurs while lane splitting, and police may cite you under general unsafe driving laws.
- Motorcycle safety organizations generally recommend against lane splitting outside of California due to visibility and accident risk, regardless of local law.
California's lane splitting rules and speed limits
California Vehicle Code Section 21658.1 does not use the term "lane splitting" but instead describes the practice: a motorcycle operator may pass between lanes or rows of stopped or moving vehicles. The law does not prohibit it outright, which makes California unique.
However, California's Highway Patrol issued guidelines in 2015 recommending that riders not exceed 10 miles per hour faster than surrounding traffic and not split lanes when traffic is moving faster than 30 miles per hour. These are recommendations, not legal requirements, but they reflect what law enforcement considers reasonable. Riders who split lanes at much higher speeds or in unsafe conditions can still be cited under California's general unsafe driving statute.
Lane filtering — moving between stopped or nearly stopped vehicles, typically at a red light — is also permitted in California under the same code section. There is no explicit speed limit for filtering, but the same safety standard applies: the maneuver must be done safely and without creating hazard.
States where lane splitting is explicitly illegal
The majority of states have laws that directly prohibit lane splitting. These include Texas, Florida, New York, Illinois, Pennsylvania, Ohio, Georgia, North Carolina, and many others. In these states, lane splitting is treated as an illegal lane change and can result in a traffic citation with fines ranging from $100 to $500 or more, depending on the state and whether it contributed to an accident.
Some states classify lane splitting as reckless driving or unsafe operation of a motorcycle, which carries higher penalties. A conviction can also affect your driving record and insurance rates. If you cause an accident while lane splitting in a state where it is illegal, you may face both criminal charges and civil liability.
Police enforcement varies by jurisdiction. Some departments prioritize lane splitting stops; others focus on it only when an accident occurs. However, the legal risk remains regardless of enforcement frequency.
States with lane filtering laws or unclear status
A small number of states have recently passed or are considering lane filtering laws. Utah legalized lane filtering in 2018, allowing motorcycles to move between stopped or slow-moving traffic (under 15 miles per hour) at traffic lights or in congested conditions. Arizona passed a similar law in 2022. Montana allows lane filtering under specific conditions. These laws typically explore only to stopped or very slow traffic, not to lane splitting at highway speeds.
Several other states have no explicit law addressing lane splitting one way or the other. In these jurisdictions, a rider could potentially be cited under general unsafe driving or improper lane change statutes, but there is no specific prohibition. States in this gray area include South Carolina, Kentucky, and a few others. The absence of a specific law does not mean the practice is safe or that you will not face legal consequences if stopped.
Because these laws change, checking your state's current motorcycle code or contacting your state's Department of Motor Vehicles is the only reliable way to know the current status in your location.
Insurance and liability when lane splitting
Even in California, where lane splitting is legal, insurance companies may deny or reduce a claim if an accident occurs while you are lane splitting. Insurance policies often include exclusions for riding in an unsafe manner, and some insurers argue that lane splitting — even where legal — falls into that category.
In states where lane splitting is illegal, an insurance company has stronger grounds to deny a claim. If you are cited for illegal lane splitting and cause an accident, the citation can be used as evidence that you were operating unsafely, which may void coverage or trigger a policy cancellation.
Before lane splitting in any state, review your motorcycle insurance policy or contact your insurer directly to understand how they treat the practice. Some insurers are more permissive than others, and some may charge higher premiums for riders who lane split regularly.
Why motorcycle safety organizations caution against lane splitting
The American Motorcyclist Association and the Motorcycle Safety Foundation do not recommend lane splitting outside of California, even in states where it may not be explicitly illegal. Their position is based on accident data and visibility concerns.
Lane splitting reduces the time a car driver has to see and react to a motorcycle. Drivers do not expect a motorcycle to appear between lanes, and many do not check their mirrors or blind spots before changing lanes themselves. A collision between a motorcycle and a car during a lane split often results in serious injury or death to the rider.
Riders who lane split also have less room to maneuver if they need to brake or swerve suddenly. Debris, potholes, or oil on the road between lanes can cause a loss of traction that is harder to recover from in a confined space.
What happens if you are stopped for lane splitting
If a police officer stops you for lane splitting in a state where it is illegal, you will likely receive a citation for unsafe lane change or a similar violation. The officer may also issue a ticket for reckless driving if they believe the maneuver was particularly dangerous.
You have the right to contest the citation in traffic court. You can argue that the maneuver was safe, that you did not create a hazard, or that the officer misidentified what you were doing. However, the burden is on you to prove your case, and video evidence from a dashcam or traffic camera can work either for or against you.
If you are stopped in California, the officer may still cite you if they believe you violated the safety guidelines (exceeding 10 miles per hour faster than traffic or splitting at speeds above 30 miles per hour). The citation would likely be under the general unsafe driving statute rather than a specific lane splitting law.
Frequently Asked Questions
Is lane splitting legal in my state?
Only California explicitly permits lane splitting. Utah and Arizona allow lane filtering (moving between stopped or very slow traffic). Most other states prohibit it. Check your state's motorcycle code or contact your Department of Motor Vehicles to confirm the current law where you ride.
Can I be sued if I cause an accident while lane splitting?
Yes. If you cause an accident while lane splitting, the other driver can sue you for damages. In states where lane splitting is illegal, the citation itself can be used as evidence that you were negligent. Even in California, a lawsuit can proceed if the other party argues you were not following safety guidelines.
Will my insurance cover an accident if I was lane splitting?
It depends on your policy and insurer. Many insurance companies reserve the right to deny claims for accidents that occur during unsafe riding, and some classify lane splitting as unsafe even where it is legal. Contact your insurer before lane splitting to understand your coverage.
What is the difference between lane splitting and lane filtering?
Lane filtering typically refers to moving between stopped or very slow traffic, often at red lights. Lane splitting usually means passing moving traffic at higher speeds. Some states allow filtering but not splitting. The legal distinction varies by state.
Can I lane split if traffic is moving slowly on the highway?
In California, you can lane split in slow traffic as long as you do not exceed 10 miles per hour faster than surrounding vehicles and traffic is not moving faster than 30 miles per hour. In other states, lane splitting is illegal regardless of traffic speed. Check your state's law before attempting it.