Get the ABC10 mobile app for breaking news alerts, live shows and to send us news tips. A highway will often be closed before an R-3 condition is imposed. Road Conditions - County Maintained Only. The intensifying storm follows an already challenging four days of icy and dangerous driving conditions throughout the state, leading the National Weather Service to describe driving conditions around Lake Tahoeas "extremely dangerous to impossible.". Highway US-70 Road Conditions in California - ca-17.com and United States Travel Information