 at speed. So with eyes out in the road spray, 395 getting quite wet now in Arlington and pretty slow near the 14th Street Bridge. You will not be able to take the downtown exits for 12th Street or 14th Street. You will not be able to exit at Potomac Park. U.S. Park Police have closed exit two and there are a slew of road closures around the National Mall, Constitution Avenue among them. They will be in effect whether or not