 The left half blocked north of Fairfax County Parkway. It is two right lanes getting by very slowly near mile marker 168. Southbound, some congestion in Springfield. Down at the Occoquan, some minor slowing. The southbound trip not nearly as troublesome. 66 westbound heavy in Centerville. Still jammed Markham toward Linden where the van caught on fire. Only one left lane getting by before Linden exit 13.