Motorcycle Lane Filtering

Lane filtering is now legal in Colorado

Colorado recently passed a new law allowing motorcycles to pass between vehicles stopped on the roadway and traveling the same direction as the rider. The law is effective Aug. 7, 2024 and has these conditions:

• The motorcycle passes on the left of the vehicle in front of them.
• The other vehicles are stopped and traveling the same direction as the rider, such as in traffic or at a red light.
• The lane is wide enough to pass safely.
• The motorcycle, when passing, does not exceed 15 miles per hour.
• When the stopped vehicles begin to move, the motorcyclist shall cease passing.

A motorcycle rider may not overtake or pass:

• On the right shoulder.
• By crossing over the center line into oncoming traffic.

Lane filtering is not the same as lane splitting. Lane filtering allows motorcyclists to safely navigate through stopped traffic. Lane splitting, which remains illegal, involves riding between lanes of moving vehicles.

Motorcyclists: Filter Safely

Five rules must be followed to filter:

1. If a rider wants to pass, traffic must be at a complete stop.
2. The lane must be wide enough to fit the vehicle and motorcycle while passing.
3. The motorcycle must go 15 mph or less.
4. The rider must pass safely and control the motorcycle.
5. The rider must pass on the left and not enter the oncoming traffic lane.

Riders should always prioritize safety and be mindful of their surroundings. It is often impossible to predict the actions of other vehicles. Motorcyclists should always ride sober, wear protective gear, and stay focused on the road. Colorado law requires a valid motorcycle license or a motorcycle endorsement on your existing driver’s license to legally operate a motorcycle on public roads.

Share the Road: What Other Vehicle Drivers Need to Know

Traffic safety is a shared responsibility. Drivers should understand that motorcycle riders are more exposed and vulnerable to unexpected road hazards. Lane filtering is one way for motorcyclists to protect themselves.

Treat riders with courtesy as they practice lane filtering.

The new law could save lives

Colorado’s new lane filtering law could save motorcyclists’ lives. Lane filtering reduces the chance for motorcyclists to be rear-ended by a car or truck.. Collisions from behind can cause serious injury or kill motorcycle riders.

CDOT will complete a report on lane filtering by the beginning of 2027. The report will compare data from before and after the effective date of the law and include information on motorcycle rear-end and side-swipe crashes.

Frequently Asked Questions