Seriously, if you live in Virginia, forget about coming into the District on Inauguration Day. The Key, Memorial, Fourteenth and Roosevelt Bridges are all going to be closed on the 20th. In addition, the Chain Bridge is likely going to be closed, as well, as I’m betting money it can’t handle the overflow traffic.
If you’re playing along at home, that’s every major or minor crossing between Virginia and the District. Your only bet at that point is Metro. Which, I have already pointed out, will be over capacity that day.