Montana, Oregon latest states to act on motorcycle lane splitting

June 2, 2021

Keith Goble


One trending topic at statehouses around the country this year is the legalization of driving motorcycles between traffic lanes, or lane splitting, in certain circumstances.

The focus of the legislation is permitting motorcyclists to bypass congestion. Two states acted prior to this year to legalize the maneuver.

California first to act

In 2016, the state of California adopted a rule to permit so-called lane splitting with motorcycles. Previously, state law neither permitted nor forbade the practice of riding motorcycles between rows of stopped or slowed traffic.

The Golden State’s law allows motorcycles to travel between lanes at speeds up to 10 mph, provided that traffic is moving at 30 mph or less.

The California Highway Patrol offers tips for motorcyclists on how to safely perform the maneuver.

Utah follows suit

In 2019, a Utah law authorized motorcyclists to travel between lanes only on roads posted at 45 mph or less.

The state’s “lane filtering” rule requires that traffic on roadways with two adjacent lanes be stopped and that the motorcycle is traveling 15 mph or less.

Montana adopts rule

The Montana Legislature has acted this year to become the third state to permit lane splitting.

Gov. Greg Gianforte signed into law a bill to legalize filtering when “on a road with lanes wide enough to pass safely.”

Two-wheeled motorcycles soon will be allowed to overtake stopped or slow-moving traffic at a speed up to 20 mph. Filtering between lanes of stopped traffic traveling in the same direction is allowed as conditions permit.

Previously SB9, the new rule takes effect on Oct. 1.

Oregon governor says ‘no’

In Oregon, Gov. Kate Brown last week vetoed a bill to authorize the maneuver in her state.

State legislators approved a bipartisan bill to allow travel between lanes on multilane highways with a speed limit of at least 50 mph. The practice would only be authorized when traffic had slowed to 10 mph or less on affected roadways.

SB574 specified that motorcyclists could lane filter only when traveling up to 10 mph faster than the flow of traffic. An additional requirement was included that the motorcyclist not impede normal movement of traffic.

“This practice, known as ‘lane filtering,’ is currently unlawful – as it is in many other states – due to legitimate public safety concerns,” Brown wrote in her veto message.

“Although the bill proposes conditions with which a motorcyclist must comply (such as a maximum speed at which motorcyclists can travel between lanes), I remain worried that some will not adhere to these conditions.”


Advocates say that lane splitting is beneficial because it saves motorcyclists time and fuel. They say the practice also helps many motorcycles avoid overheating while sitting in traffic.

Some people in the trucking industry have raised concerns about motorcyclists attempting the maneuver around large vehicles.

Additional background

Legislation introduced this year in Massachusetts and Washington also called for legalizing motorcyclists to perform the maneuver to bypass congestion. Both bills failed to advance.

Other states have rules in place on the topic.

Hawaii allows riding on the road shoulder at up to 10 mph. Lane splitting, however, is prohibited.

According to an Oregon Legislature analysis, there are 11 other states where lane splitting is prohibited: Arkansas, Delaware, Kentucky, Mississippi, Missouri, New Mexico, North Carolina, Ohio, Oklahoma, Texas, and West Virginia. LL

More state trends

Keith Goble, state legislative editor for Land Line Media, keeps track of many trends among statehouses across the U.S. Here are some recent articles by him.


Keith Goble has been covering trucking-related laws since 2000. His daily web reports, radio news and “OOIDA’s State Watch” in Land Line Magazine are the industry’s premier sources for information regarding state legislative affairs.