Lane splitting, riding a motorcycle between lanes of stopped or slow-moving traffic, is not legal in Massachusetts. State traffic law requires every vehicle, including motorcycles, to stay within a single marked lane, and it does not carve out an exception for motorcycles moving between rows of cars. If you ride a motorcycle in Massachusetts, or you were recently hurt in a crash involving a motorcycle that was between lanes, understanding how this rule works matters both for staying out of trouble with police and for protecting an injury claim.
Below, we explain what Massachusetts law actually says about lane splitting and lane filtering, what can happen if a rider is cited for it, and how lane splitting can affect a personal injury claim after a motorcycle accident.
What is lane splitting?
Lane splitting refers to a motorcycle traveling between two lanes of traffic that are moving in the same direction, often to pass stopped or slow-moving cars in a traffic jam. A related maneuver, sometimes called lane filtering, involves a motorcycle moving between cars that are completely stopped, such as at a red light, to reach the front of the queue. Both practices put a motorcycle in the narrow space between vehicles rather than within a single travel lane.
Lane splitting is legal in only a small number of states, most notably California, and a few others allow limited lane filtering at low speeds. Massachusetts is not one of them. Neither lane splitting nor lane filtering is permitted here, regardless of how slow traffic is moving or how much space is between vehicles.
What does Massachusetts law say about lane splitting?
Massachusetts traffic law, found in Massachusetts General Laws Chapter 89, requires that vehicles operate within a single lane and prohibits driving between lanes or rows of vehicles. A motorcycle is treated the same as any other motor vehicle for purposes of lane use. That means a motorcyclist is expected to occupy a full lane, use it exclusively, and change lanes only when it can be done safely and with proper signaling, the same standard that applies to a car or truck.
There is no statutory carve-out in Massachusetts that permits a motorcycle to travel in the gap between two lanes of traffic, even when that traffic is barely moving. Riders who split lanes are operating outside the lane markings, which is itself a violation, separate from any other traffic infraction that might also apply, such as speeding or an unsafe lane change.
Penalties and enforcement
A motorcyclist who is stopped for lane splitting in Massachusetts can be cited for a marked lanes violation or a related moving violation, which typically carries a fine. Depending on the circumstances, an officer might also cite the rider for unsafe operation or reckless driving if the maneuver created a hazard for other vehicles. Repeated violations, or a citation issued in connection with a crash, can also affect a rider’s insurance rates and driving record.
Enforcement varies by department and by how heavy traffic is at the time, but the fact that lane splitting is common in congested areas does not make it lawful. Riders should not assume that because other motorcyclists do it, the practice is sanctioned under Massachusetts law.
How lane splitting affects a motorcycle injury claim
The more significant consequence of lane splitting often comes up after a crash, when a rider is trying to recover compensation for injuries. Massachusetts follows a modified comparative negligence rule under Massachusetts General Laws Chapter 231, Section 85. Under this rule, an injured person’s compensation is reduced by their own percentage of fault, and if that person is found more than 50 percent at fault for the accident, they cannot recover anything from the other party.
If a rider was lane splitting at the time of a crash, an insurance company or defense attorney will often argue that this was negligent conduct that contributed to the accident, and try to shift a larger share of fault onto the rider. That does not automatically end a claim. A driver who changed lanes without checking mirrors, opened a car door into a rider’s path, or otherwise drove carelessly can still bear significant fault even if the motorcyclist was between lanes at the time. Fault in Massachusetts is allocated based on the actual facts of how the crash happened, not simply on which traffic law was broken first.
In practice, the outcome of a claim involving lane splitting depends heavily on the evidence: witness accounts, dashcam or traffic camera footage, the police report, and the physical evidence at the scene. An experienced motorcycle accident attorney can investigate these facts and work to keep the rider’s share of fault as low as the evidence supports, which directly affects how much compensation is available.
What to do if you were hurt while lane splitting or riding near a lane-splitting motorcycle
If you were injured in a motorcycle accident in Massachusetts, whether or not lane splitting was involved, seek medical attention promptly and follow through with treatment, since gaps in care can be used against you later. Preserve any photos, videos, or witness contact information from the scene, and avoid discussing fault with an insurance adjuster before speaking with an attorney, since early statements are often used to argue comparative fault.
Keep in mind that Massachusetts also imposes a three-year statute of limitations on personal injury lawsuits under Massachusetts General Laws Chapter 260, Section 2A. Waiting too long to pursue a claim, even while medical bills and lost wages accumulate, can permanently bar you from recovering compensation, so it is worth having a case evaluated well before that deadline approaches.
Frequently asked questions
Is lane filtering legal in Massachusetts even at very low speeds?
No. Massachusetts law does not distinguish between lane splitting at highway speeds and lane filtering at very low speeds between stopped cars. Both require a motorcycle to leave its marked lane and travel between rows of vehicles, which is prohibited regardless of speed.
Can I still recover compensation if I was lane splitting when a driver hit me?
Possibly. Massachusetts uses modified comparative negligence, so you can still recover if you are found 50 percent or less at fault, with your compensation reduced by your share of fault. If the other driver’s conduct, such as an unsafe lane change, was a significant cause of the crash, you may still have a viable claim.
Will a lane splitting citation automatically be used against me in a claim?
A citation can be used as evidence of fault, but it is not automatically decisive. Insurance companies and courts look at the full set of facts surrounding the crash, not just whether a citation was issued.
Are there any Massachusetts cities or areas where lane splitting is unofficially tolerated?
Enforcement can vary by location and by how congested traffic is at a given time, but tolerance in practice does not change the underlying law. Lane splitting remains a violation statewide, and it can still be used to argue comparative fault after a crash even where citations are rarely issued.
If you or a loved one has been injured in a motorcycle collision in Massachusetts, the team at Scalli Murphy Law, P.C. can review the facts of your case, investigate fault on all sides, and help you understand your options. Learn more about our work on motorcycle and motor vehicle injury claims, or call us today at (617) 387-7000 for a free consultation.