Lane Splitting: A Comprehensive Guide (2025)

What Is Lane Splitting?

Lane splitting is when motorcycles navigate between lanes of vehicles moving in the same direction. It allows motorcycles to progress through traffic more efficiently by using the space between lanes. While lane splitting has become quite common, it’s illegal in most jurisdictions.

Lane Filtering vs. Lane Splitting

Lane splitting and lane filtering are two terms often used interchangeably, but they refer to slightly different practices. Here are the key attributes of lane splitting:

• A rider travels between two lanes of traffic moving in the same direction
• Riders typically do this during busy traffic hours
• Some states allow it, but most prohibit the behavior

While it is similar to lane splitting, lane filtering has some key differences:

• The vehicles are either stopped in traffic or moving very slowly
• Motorcyclists typically use this strategy to move to the front of the line at intersections
• They may also filter through stoppages on major highways and interstates

Lane filtering might occur at a crowded urban intersection, where motorcycles move to the front of stopped traffic to avoid delays. Lane splitting, on the other hand, is more common on busy highways, where motorcyclists use the narrow spaces between lanes to keep moving during peak traffic hours.

Generally speaking, lane filtering may be less likely to cause motorcycle accidents because the rider is passing between stopped or slow-moving cars. However, it’s important to follow local laws and practice safe operating habits.

States Where Lane Splitting is Legal

Below, we detail the regulations in each state where lane splitting, or similar actions, are allowed.

California

California is the only state that allows full lane splitting. Motorcyclists are permitted to ride between lanes at various speeds, though the California Highway Patrol advises against exceeding 10 mph above surrounding traffic and recommends not splitting lanes at speeds over 30 mph.

Utah

Utah allows lane filtering under specific conditions. Motorcycles can pass between stopped vehicles. This law aims to reduce congestion and prevent rear-end collisions.

Arizona

Arizona’s laws permit lane filtering in certain situations, allowing motorcycles to move between cars stopped in traffic. The speed limit must be 45 mph or less and the motorcyclist must not exceed 15 mph.

Hawaii

Hawaii has a limited version of lane filtering, called shoulder surfing, permitting motorcyclists to travel along the shoulder in congested conditions. This is unique to Hawaii and is meant to help ease traffic in urban areas.

Montana

Montana’s lane filtering law allows motorcycles to pass between stopped vehicles. The motorcyclist must not exceed 20 mph.

Can Motorcycles Split Lanes?

Yes, motorcycles can legally split lanes, but only in one state: California. The state’s laws on lane splitting are pretty broad, too. Riders can travel between vehicles moving in the same direction at low or even high speeds.

The California Department of Motor Vehicles (DMV) has issued some additional guidelines for motorcyclists. These provisions are meant to help decrease the risk of vehicle accidents. The recommendations are as follows:

• Riders should not travel over 10 miles per hour faster than surrounding traffic
• Splitting is discouraged at speeds greater than 30 miles per hour
• Riders should not split lanes near exits and on-ramps

Again, these are recommendations only, which means that riders can legally travel faster than suggested while splitting lanes in California. Naturally, this behavior can be incredibly dangerous.

Risks Associated With Lane Splitting

There are many dangers associated with splitting lanes, including:

Increased Risk of Personal Injury

The most obvious danger of splitting lanes is personal injury. You could seriously harm yourself or others by splitting lanes. That’s likely why most states haven’t legalized splitting.

Typically, riders involved in a motorcycle crash suffer the greatest injuries, especially if they aren’t wearing a helmet or other safety equipment. However, motorcyclists can also cause serious harm to occupants of passenger vehicles, particularly if the rider is traveling at high speeds.

Limited Space

The narrow space between lanes leaves little room for error, making it challenging for motorcyclists to react to sudden changes in traffic or road conditions. If you decide to attempt splitting, make sure you have enough distance and space to adjust if a vehicle merges or changes lanes.

Reduced Visibility

Due to their size, motorcycles are already difficult to see, especially if riders are wearing dark clothing. When a rider moves in between lanes of traffic, they may position themselves in other drivers’ blind spots, making them even harder to spot.

If you operate a motorcycle and decide to engage in splitting or filtering, be mindful that other drivers may not be able to see you. Try to stay in an area where you are visible to the driver. Typically, if you can see the driver’s face in their side mirrors, they should also be able to see you.

While lane splitting and filtering have their advantages, both practices come with risks. For motorcyclists choosing to engage in these practices, it’s essential to take extra safety precautions:

• Wear high-visibility gear to increase the chances that other drivers will see you.
• Use your headlights, even during the day, to make your presence known.
• Avoid sudden lane changes and keep a steady speed to reduce the chance of surprising nearby drivers.
• Position yourself where you’re visible to other drivers. If you can see the driver’s face in their side mirror, they should also be able to see you.

Have You Been Injured in a Motorcycle Crash?

If you’ve been hurt by a motorcyclist engaged in unlawful lane splitting or have suffered injuries while legally filtering through traffic, it’s important to seek legal representation right away.

ConsumerShield can connect you with an experienced lawyer who specializes in motorcycle accident laws in your area and will fight for justice on your behalf. A lawyer can assist with everything from explaining the lawsuit settlement process to negotiating with insurance companies.