Then, once one arrives at the Pentagon - that little T, right? - there are suddenly no signs. I guessed right, and suddenly had the option of getting back onto the GW Parkway or getting onto VA 110. Or, I guess, backing up or something weird, but I suspect y'all are very Not Cool with cars doing weird things in your parking lot. I understand.
So, a little sign at that T would help. Or make them take the I-395 sign on the Parkway down. All I can say is, I'm glad Cherry Blossom Fever is dying down or my scenic detour around the Tidal Basin would have been really stressful.