As Colorado's roads see an increase in two-wheeled traffic, there's a crucial distinction that motorcyclists and drivers alike must recognize: the difference between lane filtering and lane splitting. Last year, the state gave the green light to lane filtering, a move that is slowly being embraced by Coloradans since its inception in August 2024. In a clarification that speaks to the necessity of mutual respect and safety on the roads, Colorado State Patrol has outlined the legalities of this practice.
"The first thing Coloradoans need to understand is that there is a seemingly small but important difference between lane filtering and lane splitting," announced Col. Matthew C. Packard, Chief of the Colorado State Patrol. Despite their similarities, one is lawful while the other remains off limits. Lane splitting, a tactic often seen where a motorcycle cruises between lanes of moving or halted cars, remains illegal due to the inherent safety risks when traffic is in motion. Conversely, lane filtering is permissible in circumstances where both the rider’s lane and the adjacent ones are at a complete stop. This typically occurs at traffic lights or in bumper-to-bumper traffic scenarios, granting bikers the ability to safely maneuver to the front of the queue.
Compliance with Colorado's lane filtering laws is enforced through a set of rules. According to the state, bikers must only filter when the adjacent traffic is at a standstill and the lane width is sufficient to accommodate both the motorcycle and a vehicle side by side. While filtering, the motorcyclist must not exceed a speed of 15 mph, ensuring the movement is performed securely. Furthermore, the rider is obliged to maintain control throughout the maneuver and always filter to the left, without crossing into the opposing traffic lane.
"It’s up to the rider to assess each situation and determine if the conditions are safe and legal to filter – it's an option, not a requirement to filter," Col. Packard emphasized. It serves as a reminder that this measure is not compulsory, rather an available choice for riders to navigate congestion. While lane filtering intends to mitigate the risk of motorcyclists being trapped between cars, it also places a duty on all road users to operate vehicles thoughtfully and without distractions. This mutual understanding aims to facilitate smoother, safer commutes for everyone traveling on Colorado's roads.
Lane filtering, though novel to Colorado, is not without precedent in the United States. Other states like Arizona, California, Hawaii, Montana, and Utah have already integrated varied forms of lane filtering into their traffic laws. Notably, California remains the lone state to legalize lane splitting. As Coloradans adapt to these changes, the main thrust from the State Patrol is clear: know the rules, respect the guidelines, and share the road carefully.
