There was a serious collision at Rt. 20 and Shales parkway this morning, which is a major high volume intersection on my commute. The police had the entire section closed to motor traffic. I rode up to the officer directing traffic at the first barricade and asked him if it was ok if I ride through. He says "Yeah, I don't care". Once I got down to the intersection another officer told me I could go straight (my normal direction) or turn right but not left. I could see lots of emergency vehicles and smoke off to the left as I crossed. The reroute caused many motorists to be late for work, but the bicyclist was on time again!