Hi there! I'm flying out of BWI this Friday at 7 pm. I have to drive myself there so my car is there when I return. I have the option to either drive from work (at the Pentagon) or to drive from home (Carlyle area of Alexandria at Eisenhower Metro). Considering Friday afternoon traffic, what would be the best route and what time would I need to start driving to be at BWI by 5:30 or so? Thanks!