Roadways, in particular the state highway system and some of the other high traffic roadways, are a disproportionate source of the ultra-fine particles that are causing the decline in Lake Tahoe clarity. In this interview Bob Larsen, Staff Scientist at the Lahontan Regional Water Quality Control Board, talks about the central question for today’s road managers in the Lake Tahoe Basin, “How can we better manage roads to reduce the amount of traction abrasives and roadway products that actually make their way into the stormwater and into Lake Tahoe?”