I think the link has updated info.
https://mpdc.dc.gov/release/traffic-advisory-us-armys-250th-birthday-parade
Also, I think DC residents are largely trapped in the city this weekend. Here's the bridge situation:
The following highway exits, freeways, expressways, and bridges will be closed to vehicle traffic from approximately at 12:01 a.m. on Friday June 13, 2025, through 6:00 a.m. on Monday, June 16, 2025:
Eastbound I-395 Exit 1 toward 14th Street / National Mall
Eastbound I-395 HOV exit toward 14th Street / National Mall
Eastbound I-395 Exit 3 toward 12th Street Expressway
Eastbound E Street expressway
Inbound TR Bridge split to Independence Avenue
Inbound TR Bridge split to Constitution Avenue
Northbound Potomac River Freeway exit toward E Street
Westbound I 395 Exit 4A and 4B toward 12th Street, SW and Maine Avenue, SW
Westbound E Street Expressway split to Southbound Potomac River Freeway
Southbound Potomac River Freeway exit toward Independence Avenue and Maine Avenue
Southbound Potomac River Freeway exit toward E Street
Arlington Memorial Bridge
The following expressways will be closed to vehicle traffic from approximately 9:00 p.m. on Friday June 13, 2025, through 6:00 a.m. on Monday, June 16, 2025:
12th Street Expressway
9th Street Expressway entrance from Constitution Avenue, NW