Lane splitting is one of those topics that tends to generate strong opinions from just about everyone who has an opinion on motorcycles at all. Drivers who’ve been startled by a bike sliding through traffic have one view of it. Riders who rely on it as a practical part of navigating Southern California congestion have another. And when an accident happens while lane splitting was involved, the question of what it means for a claim is one that comes up almost immediately.
The honest answer is that it depends, and the specifics of how it depends are worth understanding before any conversations with insurance companies are had or any decisions about a claim are made. A motorcycle accident attorney can help sort through exactly where lane splitting falls in the context of what actually happened in a specific accident.
Lane Splitting Is Legal in California, But There Are Conditions That Come With That
California was the first state in the country to formally legalize lane splitting. Assembly Bill 51 was signed into law in 2016 and added Section 21658.1 to the California Vehicle Code, which officially recognized the practice and directed the California Highway Patrol to develop safety guidelines around it.
What the law does not do is set a specific speed limit for lane splitting or create a penalty clause for unsafe splitting on its own. That part is where things get more nuanced. The CHP guidelines that were developed recommend not exceeding surrounding traffic by more than 10 mph, avoiding lane splitting when traffic is moving at 50 mph or faster and sticking to the two leftmost lanes when possible. These aren’t enforceable rules in the way a speed limit is, but they do become very relevant in the context of a motorcycle accident claim because they’re what an insurer or defense attorney is going to measure the rider’s behavior against.
What the Research Actually Shows
A lot of people assume lane splitting is inherently reckless. The data doesn’t really support that.
A study by the UC Berkeley Safe Transportation Research and Education Center that examined 5,969 motorcycle collisions found that 17 percent of those accidents involved lane splitting. But importantly, riders who were lane splitting within reasonable speed parameters actually had lower rates of head injuries, torso injuries and fatal injuries than riders who weren’t lane splitting at the time of their crash. The reduction in rear-end collisions is one of the reasons the practice is considered a safety measure by many riders rather than a dangerous one.
That context matters for a motorcycle accident claim because an insurer or opposing party is going to try to frame the lane splitting as inherently reckless behavior. Having a motorcycle accident attorney who understands the research and the legal framework that surrounds lane splitting makes it harder for that argument to land.
How Lane Splitting Gets Used Against You in a Claim
Even though lane splitting is legal, insurance companies and defense attorneys still try to use it against injured riders. A few ways that tends to happen:
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Arguing that the rider was traveling too fast relative to surrounding traffic, even when no law sets a specific limit, and using that to push more fault onto the rider
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Claiming the maneuver was performed unsafely regardless of speed, based on the general circumstances of where and how it was happening
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Pointing to the fact that the rider was in a less visible position when the accident occurred
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Suggesting that a reasonable rider wouldn’t have been splitting lanes under the specific conditions that existed at the time of the crash
California’s comparative negligence rules mean that even if some portion of fault is assigned to the rider for lane splitting, compensation isn’t eliminated entirely. It gets reduced by the percentage of fault that is attributed. So if a rider is found to be 20 percent at fault for how the lane splitting was being performed and the other driver is found to be 80 percent at fault for the underlying cause of the crash, the rider can still recover 80 percent of their damages.
The fight over that percentage is exactly where a motorcycle accident attorney earns their value. Insurers are going to push the rider’s share of fault as high as they can, because every point of fault they assign reduces what gets paid out.
When Lane Splitting Doesn’t Hurt the Claim Much at All
Not every accident that happens while lane splitting is primarily about the lane splitting itself. In a lot of cases, the crash was caused by something the other driver did, and the lane splitting was just part of the backdrop.
If a car changed lanes without signaling and struck a rider who was lane splitting, the driver’s failure to check their mirrors and signal is the primary cause of the accident. If a driver deliberately tried to block a rider who was splitting, that’s its own category of negligent conduct entirely. In those situations, the fact that lane splitting was occurring doesn’t automatically transfer a significant share of fault to the rider, even if the insurer tries to make it seem that way.
Our post on lane splitting tips for motorcyclist safety covers what safe lane splitting looks like in practice, and a lot of those details become relevant when a claim is being built around what the rider was doing and whether it was reasonable given the conditions.
The Bias Problem
There’s something worth naming directly that doesn’t always get talked about in these conversations. Motorcyclists face a real bias in how their accidents are perceived, and that bias affects both how insurance adjusters handle claims and how fault gets assigned in the early stages of a dispute.
A significant portion of drivers aren’t even aware that lane splitting is legal in California. A 2024 survey by the California Office of Traffic Safety found that only about 53 percent of drivers knew lane splitting was permitted under state law. That means the adjuster reviewing the claim, and potentially a jury if it gets that far, may be starting from a place of assuming the rider was doing something wrong simply by being between lanes. That assumption has to be actively addressed, not just hoped away.
A motorcycle accident attorney who handles these cases regularly knows that the bias is there and knows how to counter it with the legal and factual record rather than letting it shape the outcome by default.
What to Do After an Accident That Involved Lane Splitting
The steps that get taken right after the crash have a real effect on how the claim comes together later, especially when lane splitting was part of the picture.
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Get medical attention right away and document every injury
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Make sure a police report gets filed and review it for accuracy, since the description of the accident and the positions of the vehicles matters
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Take photos of the scene, the lane positions, any skid marks and the damage to both vehicles
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Get contact information from any witnesses, since an independent witness who saw what actually happened can be very useful when fault is being disputed
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Note the speed of traffic at the time and any conditions that are relevant to whether the lane splitting was being done within the CHP’s guidelines
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Don’t give a recorded statement to the other driver’s insurance company before talking to a motorcycle accident attorney
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Don’t accept an early settlement offer before the full extent of the injuries is known
Our post on how a motorcycle accident lawyer can help you receive the compensation you deserve goes into more detail on why legal representation changes the outcome of these claims and what the process of building a strong case actually looks like.
Talk to a Motorcycle Accident Attorney About Your Claim
Lane splitting being involved in an accident doesn’t mean a motorcycle accident claim is weakened beyond repair. It means the claim is going to require more careful handling, more attention to the specific facts of what happened and someone in your corner who understands how California’s comparative negligence rules interact with the legal status of lane splitting.
Steinberg Injury Lawyers has been helping injured motorcyclists throughout Southern California navigate exactly these kinds of claims for decades. If you were hurt in a motorcycle accident and lane splitting was part of what happened, reach out for a free consultation and we’ll help you understand where your claim actually stands.
