 Due to an earlier crash involving an overturned vehicle, you're most likely being diverted outside of that. On the Maryland side of things, the inter-county connector westbound between Columbia Pike and New Hampshire Avenue at the center of the roadblock due to a medical emergency. Also out in Dickerson, 109 both ways between Thurston Road and Slate Quarry Road, a road closure is in effect there. On the Virginia side of things, Dulles Toll Road eastbound between Hunter Mill and the main toll plaza.