If you are foolish enough to come to Washington for the inauguration (not a political comment, rather a comment on the traffic mess you will be getting yourself into), here are the myriad of traffic restrictions that run from January 18 to the 23rd.
https://mpdc.dc.gov/release/2017-pre...rtation-plan-0
A special non-traffic note: DC has very strict gun laws. Open carry is not permitted. Concealed carry MUST be with a D.C. Permit, no reciprocity with any other jurisdictions. In addition, there are Federal restrictions. No guns on the mall, in Federal buildings, or near any Inaugural activities. Basically, leave your guns at home. Oh, and don't bring those signs celebrating or decrying the event on sticks, either. The signs are ok, the sticks aren't. Basically, if law enforcement can conceive of it being used as a weapon, they're going to take it away from you.
Stay safe and sane out there.