From VDOT:
I-95 SOUTHBOUND (6:25 a.m.) For motorists stopped between exit 148 (Quantico) and the crash scene at mile marker 146, crews are preparing to guide traffic out using the 95 Express Lanes. Safety Service Patrol is driving between mile markers 148-146 to check on motorists. If you need assistance, dial #77.
I-95 SOUTHBOUND: All southbound lanes are closed south of exit 148 (Quantico) in Stafford County for a vehicle crash at mile marker 146. Southbound traffic detours at exit 148 to Rt. 1 southbound. Traffic can re-enter I-95 SB at exit 143 (Aquia/Garrisonville) in Stafford. Current congestion of approximately one mile. Traffic signals have been retimed along Route 1 to assist with heavier southbound traffic volumes. Use alternate routes to avoid delays.