Is Lane Splitting Legal in California?

Lane splitting has long been a topic of debate among drivers and motorcyclists alike. If you’ve ever seen a motorcyclist glide between two slow-moving lanes of traffic in California, you’ve witnessed this controversial maneuver in action.

So, is lane splitting legal in California? Yes, California is the only U.S. state where lane splitting is explicitly legal, thanks to a law passed in 2016. However, just because it’s legal doesn’t mean it’s always safe, expected, or understood by all road users.

At Compass Law Group, LLP, we’ve helped motorcyclists and drivers understand the legal implications of lane splitting in California. In this article, we will explore what lane splitting is, the legal framework surrounding it, California Highway Patrol (CHP) safety guidelines, and what it means for both motorcyclists and other drivers on the road.

What Is Lane Splitting?

Lane splitting refers to the act of a motorcyclist riding between two lanes of traffic moving in the same direction, usually between the leftmost lanes on a multi-lane highway. This maneuver is often used in heavy traffic to help motorcyclists navigate congested roads more efficiently.

Defenders of lane splitting in California argue it reduces traffic congestion and the risk of rear-end collisions, while critics cite potential safety hazards when not done carefully.

Before continuing this discussion, it’s important to distinguish between similar terms:

• Lane Splitting: Riding between lanes of slow-moving or stopped traffic on a multi-lane road.
• Lane Sharing: When two motorcycles ride side-by-side in a single lane, which is legal in many states, including California.
• Filtering: Moving between stopped cars, often at traffic lights, to move to the front of the line.

Is Lane Splitting Legal in California?

Yes, lane splitting is legal in California. The state made headlines in 2016 when it passed Assembly Bill 51 (AB 51), which officially defined and recognized lane splitting as a legal maneuver. This made California the first, and still the only, U.S. state to explicitly allow lane splitting.

Rather than outlining strict rules, AB 51 gave the California Highway Patrol (CHP) authority to develop safety guidelines for motorcyclists who choose to lane split. This legal recognition helps protect motorcyclists from blanket citations and provides a framework for responsible riding.

However, legality does not mean immunity. Lane splitting must still be done in a way that is “reasonable and prudent,” and any unsafe maneuvers can still result in tickets, liability in crashes, or even criminal charges in extreme cases.

California Highway Patrol Guidelines on Lane Splitting

Although California law legalizes lane splitting, the California Highway Patrol offers detailed safety recommendations to help motorcyclists ride responsibly. These aren’t enforceable laws, but they serve as strong guidelines.

These recommended guidelines include:

• Only lane split when traffic is moving at 40 mph or less. Lane splitting at higher speeds increases the likelihood of a crash.
• Speed differentials should not exceed 10 mph. Motorcyclists should never pass vehicles at high speed while splitting, and a small speed difference allows time to react to sudden movements.
• Split only between the leftmost lanes (1 and 2). This minimizes the risk of surprise from lane changes and offers the most space for maneuvering.
• Stay out of blind spots. Position yourself where drivers can see you, especially when passing larger vehicles like trucks or buses.
• Be “reasonable and prudent.” Lane splitting must be done carefully and within the context of current traffic conditions.

The CHP emphasizes that lane splitting is a discretionary maneuver. That means even if you’re within the recommended parameters, officers may still cite riders for unsafe behavior if it appears reckless or dangerous in the moment.

Safety Tips for Lane Splitting Riders

Even with legal protections, lane splitting still comes with risks, especially if not done carefully. Remember: lane splitting isn’t about rushing; it’s about flowing safely through traffic without putting yourself or others at risk. If a situation feels too tight or fast, it’s okay to pause and wait for a better opportunity.

Whether you’re a seasoned rider or new to California traffic, practicing these safety tips can help reduce your chances of a collision:

• Stick to Lanes 1 and 2: These lanes tend to be the most predictable and have fewer exits and entries.
• Avoid Splitting Near Large Vehicles: Trucks, buses, and SUVs have wider blind spots and are less likely to see you coming.
• Wear Visible Gear: Bright or reflective jackets, helmets, and even auxiliary lights can help you stand out in traffic.
• Make Noise if Needed: A quick rev or horn tap can alert a distracted driver that you’re nearby, but don’t overdo it.
• Stay Alert and Aware: Constantly scan mirrors, brake lights, and side-to-side movement. If traffic is unpredictable, wait it out.

Lane Splitting and Driver Awareness

Lane splitting isn’t just the motorcyclist’s responsibility; it also requires awareness and cooperation from other drivers. Some of the most dangerous situations arise when drivers fail to anticipate or accommodate a lane-splitting rider.

Here are some tips for drivers who share the road with motorcyclists to help keep everyone safe:

• Check Your Mirrors Regularly: Especially in slow-moving traffic, motorcyclists may approach between lanes.
• Avoid Intentionally Blocking the Lane: It’s illegal and dangerous to deliberately move to block or endanger a rider.
• Don’t Open Your Door or Change Lanes Suddenly: These actions can lead to serious injury for a motorcyclist passing through traffic.
• Stay Calm and Courteous: Motorcyclists can legally lane split in California. Treating them with respect improves safety for everyone.

Road rage or aggressive driving toward lane-splitting riders is never acceptable. Mutual respect between car drivers and motorcyclists is key to reducing accidents and misunderstandings on California roads.

Is Lane Splitting Dangerous? Risks and Misconceptions

Lane splitting is often viewed as risky, and it actually can be in some cases. However, research suggests it may reduce certain types of accidents, especially rear-end collisions in congested traffic.

A study conducted by UC Berkeley found that only 17% of motorcycle crashes involved lane splitting, and riders in these crashes were less likely to suffer head or torso injuries compared to those in other types of crashes. The key factor? Speed. When done at low speeds, lane splitting tends to be the safer option for motorcyclists in heavy traffic.

Let’s debunk some other common misconceptions:

Lane splitting is reckless.

This is not necessarily the case. If done slowly and carefully, it’s often safer for motorcyclists than sitting in stop-and-go traffic.

It causes more accidents.

Most data suggests otherwise, especially when riders follow CHP guidelines.

It’s illegal unless there’s an emergency.

False. California explicitly allows lane splitting under normal traffic conditions.

Still, there are legitimate risks. Unpredictable lane changes, inattentive drivers, and high-speed splitting can all lead to accidents. Riders who treat lane splitting as a privilege, not a shortcut, tend to fare better in terms of safety and public perception.

Legal Responsibilities for Motorcyclists and Other Drivers

Legal Responsibilities for Motorcyclists and Other Drivers

Although lane splitting is legal in California, both motorcyclists and drivers have legal duties when sharing the road, especially during congested traffic.

Ultimately, both parties must exercise a duty of care. If an accident occurs, the actions of each person involved will be closely examined to determine who acted reasonably under the circumstances.

For Motorcyclists:

• Ride reasonably and safely. Speeding, weaving, or riding aggressively can lead to citations or shared fault in an accident.
• Avoid erratic behavior. Quick lane changes and sudden maneuvers may be seen as reckless or negligent.
• Stay visible. Riders are responsible for making themselves seen and heard, especially in blind spots.

For Drivers:

• Do not intentionally block or impede motorcyclists. This is illegal and can result in liability or criminal charges.
• Avoid sudden lane changes. Drivers must signal and check blind spots, particularly the space between lanes.
• Respect the rights of all road users. Motorcyclists have as much right to the road as any other vehicle.

What Happens If You’re Involved in an Accident While Lane Splitting?

Being involved in a motorcycle accident while lane splitting in California can be legally complex. Because the state follows a comparative negligence system, fault is often shared between the motorcyclist and the driver, depending on who acted negligently.

There are a few factors that impact liability:

• Was the motorcyclist following CHP guidelines?
• Did the driver make an unsafe maneuver?
• Was either party distracted or impaired?

In many cases, video footage, witness testimony, and accident reconstruction are used to help determine fault.

Can You Sue After a Lane-Splitting Motorcycle Accident?

If you were injured while lane splitting and another driver was negligent, you may have grounds for a lawsuit under California law.

Even though lane splitting is legal, the success of a personal injury claim depends on proving that the other party violated their duty of care and directly caused your injuries. This could include actions like:

• Swerving or changing lanes without signaling
• Intentionally blocking your path
• Driving distracted or under the influence

Because comparative negligence may reduce your compensation based on your share of fault, it’s crucial to build a strong case with evidence, including dashcam footage, eyewitness accounts, and expert evaluations.

Consulting with a motorcycle accident attorney experienced in California traffic laws can help you navigate the process and pursue maximum compensation.

Ride Safe, Stay Legal

Is lane splitting legal in California? Yes. The state offers motorcyclists a unique advantage by permitting lane splitting, but that privilege comes with responsibility. If you’re a rider, follow the CHP’s safety guidelines, stay visible, and avoid speeding between lanes. If you’re a driver, remain alert and respectful of riders who may be lane splitting legally.

If you’ve been injured in a crash while lane splitting, don’t try to handle it alone. At Compass Law Group, LLP, our knowledgeable Los Angeles motorcycle accident attorneys can help you protect your rights and pursue the compensation you deserve. You don’t pay us unless we win, and the initial case consultation is free.

Give us a call today or visit our website to see what your legal options are after a lane splitting accident.

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