Last month, Marin County sheriff’s deputies started using lidar devices to record the speeds of bike riders on Open Space district fire roads and trails that receive the most complaints about dangerous activity. Lidar, short for Light Detection and Ranging, utilizes narrow laser pulses that are more accurate in calculating speeds than radar readings. The current speed limit is 15 mph on roads and trails, 5 mph when passing. sharethepathmarin.org
This article originally appeared in Marin Magazine’s print edition under the headline: “Slow Down“.