States Where Lane Splitting Is Legal — What Riders Should Know
When it comes to lane splitting (riding a motorcycle between lanes of traffic traveling in the same direction), the U.S. is still mostly off limits. But change is creeping into the laws in several states, largely through more permissive “lane filtering” statutes. Which states currently allow lane splitting or filtering, and what safety and legal precautions should motorcyclists heed? All that and more is broken down below.
What Is Lane Splitting vs. Lane Filtering?
Before jumping into state laws, it’s important to distinguish:
- Lane Splitting: refers to riding a motorcycle between active lanes of traffic (i.e. when traffic is moving, regardless of speed).
- Lane Filtering tends to refer to the practice of passing between lanes when traffic is slowed or stopped (e.g. at intersections or in gridlock).
Some states permit lane filtering under strict conditions while continuing to ban full lane splitting. These terms are sometimes used interchangeably, so always check how your state defines them.
States That Allow Lane Splitting or Filtering (2025)
While most of the U.S. still restricts motorcycles to traditional lane use, a growing handful of states are carving out exceptions. Each one has its own flavor of road culture, traffic conditions, and legal framework that shapes how filtering or splitting is handled. Here’s what riders can expect.
1. California
California is a rider’s paradise — from crowded Los Angeles freeways to scenic Pacific Coast Highway stretches, motorcycles are woven into the culture. Lane splitting is often seen as a practical survival tactic in urban gridlock. It isn’t just nice, it is a necessity.
Specific Considerations:
- The only state that allows full lane splitting (i.e. between moving traffic lanes), under prudent conditions.
- California’s Vehicle Code defines lane splitting and prohibits drivers from impeding a motorcyclist’s safe passage.
- Violations can still be ticketed under general rules like unsafe passing, reckless driving, etc.
- Though the law doesn’t set a hard speed differential cap, the California Highway Patrol (CHP) issues guidelines:
- Stay within ~10 mph of surrounding traffic
- Avoid splitting when traffic exceeds ~30 mph
- Prefer splitting between the #1 and #2 (leftmost) lanes
- Avoid trying to pass between large trucks, when visibility is impeded, or road width is constrained
2. Montana
Big Sky Country offers wide-open highways and less congestion than coastal states, but in its growing cities like Bozeman and Billings, filtering can be a real convenience during busy hours.
Specific Considerations:
- In 2021, the state legalized limited lane filtering. Filtering is allowed when overtaking vehicles that are stopped or moving no more than 10 mph (i.e. slow-moving traffic).
- The roadway must have sufficient width, and the maneuver must be “reasonable and prudent.”
3. Utah
Utah’s mix of urban centers like Salt Lake City and sweeping mountain roads mean riders can expect to encounter both stop-and-go traffic and wide-open wilderness. Filtering is especially handy in downtown areas during rush hour.
Specific Considerations:
- Legalized lane filtering (but not full lane splitting) in 2019. The law was clarified in 2025 to explicitly ban lane splitting while preserving filtering allowances.
- Key restrictions for filtering:
- Must be in a multi-lane roadway
- Speed limit of the road must be less than 45 mph
- The motorcycle’s own speed while filtering must not exceed 15 mph
- Only permitted when overtaking vehicles that are completely stopped
- Filtering not allowed on freeway on-ramps or freeway mainline (though recent HB0311 allows filtering on freeway off-ramps)
4. Arizona
With long, sunny riding seasons and a large motorcycling community, Arizona riders benefit from filtering when traffic builds up in cities like Phoenix or Tucson. Out on the desert highways, it’s less relevant — but in urban congestion, it’s a welcome option. Particularly when the temperature rises.
Specific Considerations:
- Allows lane filtering but not lane splitting. Conditions for filtering include:
- The road must have at least two adjacent lanes in the same direction
- No filtering on freeways or shoulders
- Max filter speed: 15 mph
- The posted speed limit must be less than 45 mph
- Only two-wheeled motorcycles (no sidecars or trikes)
5. Colorado
Colorado riders are drawn to mountain passes and canyon roads, but Denver and other Front Range cities can back up heavily during peak times. Lane filtering helps motorcycles navigate traffic without overheating or sitting vulnerable between cars.
Specific Considerations:
- As of August 2024, Colorado permits lane filtering-not splitting, but with key restrictions:
- Filtering allowed when motor traffic in adjacent lanes is fully stopped
- Max filtering speed: 15 mph
- The lane must be wide enough to accommodate both vehicle + motorcycle
- Bans include filtering on shoulders, passing on right, etc.
6. Minnesota
Minnesota riders face a short summer riding season, so maximizing time on the bike is key. In Minneapolis–St. Paul, where gridlock is common, lane filtering helps cut downtime at long red lights.
Specific Considerations:
- Enacted a lane filtering law (effective July 1, 2025) that allows movement between lanes under strict conditions:
- Max motorcycle speed while filtering: 25 mph
- Speed differential between the motorcycle and surrounding traffic must not exceed 15 mph
- Motorists who intentionally impede filtering motorcyclists may face misdemeanor charges
Why So Few States Allow It (and Why No Motorcycle-Only Lanes)
Even with proven benefits in places like California, most states are hesitant to allow lane splitting or filtering. Lawmakers and safety advocates worry about unpredictable driver behavior, limited visibility, and higher crash risks when vehicles weave through mixed traffic.
As for motorcycle-only lanes, the concept faces big roadblocks: limited space on existing highways, the relatively small share of motorcycles in overall traffic, and high costs to design, maintain, and enforce dedicated lanes. In short, it’s often simpler for states to adjust existing laws than to reengineer infrastructure.
Best Practices If You Plan to Filter or Split
Even where legal, lane splitting/filtering demands extra care and discipline, particularly for new riders. Use these guidelines to stay safer and more defensible:
- Know the law exactly where you ride: Always check your state’s statute or regulatory guidance, because definitions, speed limits, and enforcement practices vary wildly.
- Be conservative on speed: Even if a law allows, say, 15 mph over surrounding traffic, you are safer staying closer to the ambient traffic flow (ideally within 5–10 mph). Most legal frameworks restrict filtering to low speeds or stopped traffic. Avoid splitting when traffic exceeds certain speeds (e.g. over 30 mph in California).
- Pick your location carefully: Favor wider lanes, avoid filtering in construction zones and other areas adjacent to merging or turning lanes, avoid squeezed spaces between large vehicles, avoid shoulders or median strips unless explicitly allowed.
- Watch for hazards: Be especially alert for debris, uneven pavement, and potholes.
- Ride defensively: Be vigilant of sudden lane changes, opening doors, and inattentive drivers. Use defensive positioning, keep clear signals, wear bright or contrasting gear, and avoid riding too fast through blind spots.
- Have an escape plan: Even while filtering, always have situational awareness — plan where you’d move if a gap closes or a car suddenly moves into your space or stops. Sudden changes in traffic behavior are the greatest hazard.
- Ride with humility and patience: Just because you can split or filter legally doesn’t mean every situation is safe. If conditions don’t allow it, merge back and wait. Consider that some motorists may not appreciate being passed and may attempt to block you out.
- Avoid revving: Be mindful of the sound and emissions of your exhaust as you pass slower or stopped vehicles.
Lane splitting and filtering remain hotly debated topics across the U.S., but a growing number of states are starting to recognize their benefits when carefully regulated. For riders, knowing where it’s legal — and how to do it safely — can reduce risk and make time on the road more enjoyable.
Gillian Luce