Lane filtering is the practice where a motorcyclist moves at a low speed between two lanes of stationary or slow-moving vehicles traveling in the same direction. It typically occurs when traffic is either stopped or moving very slowly, such as at a red light or in heavy congestion. The motorcyclist overtakes vehicles within the same lane or between lanes, advancing to the front of stopped traffic. Lane filtering is often restricted to certain conditions such as speed limits (commonly under 30 km/h or about 15 mph), specific road types (e.g., roads with two or more lanes in the same direction), and safety considerations to avoid collisions or unsafe maneuvers. This practice is legal in several regions, including parts of the U.S. (state of Utah and others), Australia, and Canada, albeit with specific regulations and licensing requirements. Lane filtering improves traffic flow for motorcyclists, reduces the risk of being rear-ended, and can contribute to overall traffic efficiency, but it must be done cautiously with attention to space, speed, and surrounding traffic.