Is Lane Splitting Legal in Washington? What RCW 46.61.608 Says

Last reviewed: October 18, 2026. This article is general information, not legal advice. Washington's motorcycle rules can change when the Legislature amends the RCW; check the current statute before you ride.

If you ride in Washington, you know the scene: I-5 through Seattle at rush hour, cars crawling, and a tempting gap between the lanes. Riders arriving from California sometimes assume they can use it. In Washington, you can't. For the rules in other states, see our guide to what states lane splitting is legal in.

Short answer: Is lane splitting legal in Washington? No. RCW 46.61.608 bans riding a motorcycle between lanes of traffic or between rows of vehicles, whether that traffic is moving or stopped. Lane filtering at lights is banned too. The only lane sharing the law allows is two motorcycles riding side by side in one lane. A 2025 bill to let motorcycles use highway shoulders in slow traffic (HB 1367) did not pass.

The full statute, in plain English

RCW 46.61.608 is titled "Operating motorcycles on roadways laned for traffic." It has five parts:

1. You get the whole lane. "All motorcycles are entitled to full use of a lane and no motor vehicle shall be driven in such a manner as to deprive any motorcycle of the full use of a lane." A car cannot squeeze in beside you.
2. No passing within a lane. You cannot overtake a vehicle by sharing its lane. Since a 2013 amendment, the one exception is passing a pedestrian or bicyclist with at least three feet of clearance.
3. No riding between lanes or rows. This is the lane-splitting and lane-filtering ban.
4. Two abreast, maximum. "Motorcycles shall not be operated more than two abreast in a single lane."
5. Police exception. Subsections (2) and (3) do not apply to police officers performing their official duties.

Splitting, filtering and lane sharing: what each means in Washington

These three terms get mixed up. Here is how each one fares under Washington law:

The Washington Department of Licensing says the same thing in its rider manual: "Keep in mind that riding between lanes, commonly known as 'lane splitting', and riding on the shoulder is against the law in Washington State."

What happens if you split lanes in Washington

It is a traffic infraction, not a crime. Under RCW 46.63.020, breaking a rule in Washington's motor vehicle title is a traffic infraction unless the statute is on a specific list of criminal offenses. RCW 46.61.608 is not on that list.

The penalty is a fine. RCW 46.63.110 says a person found to have committed a traffic infraction "shall be assessed a monetary penalty," and that no penalty may exceed $250 per offense unless another part of the law authorizes more. The exact amount on your ticket comes from the courts' infraction penalty schedule (the statute's notes point to court rule IRLJ 6.2) and can include extra assessments, so check the ticket itself.

It can get worse if the riding is dangerous. If an officer thinks the way you were weaving through traffic put people at risk, separate and more serious charges can come into play. Reckless driving (RCW 46.61.500), for example, is on RCW 46.63.020's list of offenses treated as crimes rather than infractions.

It matters after a crash. If you are hit while riding between lanes, the other driver's insurer will likely argue you were breaking the law. That can reduce what you recover. If you have been hurt, our guide to choosing a motorcycle injury lawyer explains what to look for.

Is Washington about to change the law?

Washington lawmakers have looked at the idea more than once, but nothing has passed. The most recent bill we verified:

• House Bill 1367 (2025–26 session). It would have amended RCW 46.61.608 to let motorcycles "temporarily travel on the right shoulder of a limited access roadway when traffic is stopped or when the average speed of the vehicles on the travel lanes of the limited access roadway is 25 miles per hour or less." Riders could go no more than 10 mph faster than the adjacent lane, one at a time, and would have had to leave the shoulder at certain exits.
• Status: according to the Washington State Legislature's bill page, it was referred to the House Transportation Committee on January 17, 2025, heard on January 22, 2025, reintroduced and retained in committee on January 12, 2026, and heard again on February 5, 2026. It went no further. The 2026 session has ended and the 2025–26 biennium closes without the bill passing.

Notice what HB 1367 would not have done: it kept the subsection (3) ban on riding between lanes. Even the reform proposal was about shoulders, not splitting. If you hear that Washington "legalized lane splitting," check the bill on the Legislature's site before you believe it.

Riding Washington traffic safely and legally

The Department of Licensing's manual focuses on choosing the right lane and lane position rather than squeezing past cars. Practical steps that stay within the law:

• Use your full lane. You are entitled to it. Pick the position in the lane that lets drivers ahead see you in their mirrors and gives you room to move.
• Leave space when stopped. In a queue, stop where you have room to move away if a car approaches too fast from behind.
• Pass only in an open lane, the same way a car would.
• Group rides: stay at two abreast or fewer in one lane. The manual recommends a staggered formation over side-by-side riding, and single file in curves and low-visibility areas.
• Stay off the shoulder in jams, even if other riders use it.

How Washington compares

Washington is one of the states that ban riding between lanes outright. Its wording is almost identical to Florida's: see is lane splitting legal in Florida. By contrast, California expressly allows lane splitting; see lane splitting in California. Utah, Arizona, Montana, Colorado and Minnesota allow narrower filtering under speed caps; see lane filtering in Utah for one example. Our state-by-state lane splitting guide has the full table.

Sources

• RCW 46.61.608, Operating motorcycles on roadways laned for traffic (Washington State Legislature)
• RCW 46.63.020, Violations as traffic infractions (Washington State Legislature)
• RCW 46.63.110, Monetary penalties (Washington State Legislature)
• HB 1367 (2025–26) bill history (Washington State Legislature)
• HB 1367 bill text (Washington State Legislature)
• Motorcycle Operator Manual, text version (Washington State Department of Licensing)