 To the traffic center, Dave Dildine. Northwest Beach Drive still closed through Rock Creek Park, between Rock Creek Parkway and Porter Street. Police investigation. Virginia, 95 northbound, backed up in Quantico. The work zone near the truck scale is clear. Briefly, an ambulance blocked the right lane near Dumfries Road. That medical response is wrapping up. Off the outer loop of the Beltway through the Springfield Interchange and southbound on 95, a lane on the ramp blocked by a work crew.