08/31/2026
🏍️ Lane Filtering (legal in Colorado) ≠ Lane Splitting (illegal in Colorado)
👉🏼 Colorado law allows lane filtering for motorcycles, but that does not equate to lane splitting.
So, what’s the difference between filtering and splitting? 🧐
🛣️ Lane filtering allows a two-wheeled motorcycle to pass stopped traffic under very specific conditions.
✅ Traffic must be completely stopped. The motorcycle must travel 15 mph or less. The motorcycle must pass on the left side of a vehicle in its lane. Enough room must exist for the motorcycle and vehicle to safely share the space. Only two-wheeled motorcycles qualify.
✅ Once traffic begins moving, the motorcycle must stop filtering and merge back into traffic.
🚫 Lane splitting generally involves a motorcycle traveling between lanes of moving traffic. Colorado’s lane-filtering law does not authorize this practice.
So, why does Colorado allow lane filtering?
🫱🏼🫲🏽 The law aims to reduce the risk of severe rear-end crashes involving motorcycles, particularly when riders sit stopped between vehicles. Moving to the front of stopped traffic also can improve a motorcyclist’s visibility and reduce the risk of being struck from behind.
A few things Colorado law does not allow with filtering:
👎🏼 Riding into oncoming traffic to pass.
🙈 Using the right shoulder to pass.
⛔️ Passing on the right side of the farthest-right vehicle.
🛑 Continuously filtering once traffic begins moving.
🚳 Lane filtering by three-wheeled motorcycles, mopeds, e-bikes or electric scooters.
Know the difference. Share the road.
⚠️ Vehicle drivers, watch for motorcycles. Motorcycle riders, watch for vehicles. Filtering, though legal, may not always be practical, so please ride with caution.