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Illustration of a cityscape featuring buildings such as a pharmacy, supermarket, bank and coffee shop, with cars on the road, a pedestrian observing street signs about Colorado motorcycle law, and an airplane flying overhead.
(Provided by Gigafact)

A Colorado law that goes into effect Aug. 7, 2024, will allow motorcycles to ride between lanes past cars — but only if traffic has stopped. Riders must make sure lanes are wide enough to allow them to pass safely, and they are limited to 15 mph when overtaking stopped cars.

Motorcycles cannot pass using the right shoulder, and they cannot move in the opposite direction of traffic in the lanes.

The new rule aims to reduce congestion by allowing riders to move up at stop lights and during traffic jams, while decreasing the chance for motorcycles to get rear-ended. 

California and Utah are among states that allow motorcycles to ride between lanes under some circumstances. The American Motorcyclist Association endorses the practice, saying it gives motorcyclists an “escape route” from being rear-ended. An Oregon transportation study found it also prevents air-cooled engines from overheating by keeping motorbikes in motion.

This fact brief is responsive to conversations such as this one.

See full source list below.

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References:

Motorcycle lane splitting & passing, Colorado General Assembly, April 4, 2024. Source link.

Lane splitting, American Motorcyclist Association. Source link.

Lane filtering, Utah Department of Public Safety. Source link.

California Motorcyclist Safety, California Highway Patrol. Source link.

Motorcycle lane sharing, Oregon Department of Transportation, June 2010. Source link.

Type of Story: Fact-Check

Checks a specific statement or set of statements asserted as fact.

Justin George is a 1995 graduate of Columbine High School. He has worked as a reporter at six news organizations including the Boulder Daily Camera, the Baltimore Sun and the Washington Post. Email him at justin@coloradosun.com