D.C. Emancipation Day celebrations are scheduled for Saturday, but the impact on drivers starts Friday, the day that the government offices are closed and the traffic rules change.

Because the changes affect the District rules only, commuters from the suburbs may get caught up in some extra congestion. Also, the traffic rules are a bit more complicated than in some previous years, so be sure to pick out which ones apply to your route on Friday.

Reversible lanes
There will be no reversible lane operations on Connecticut Avenue NW between Legation Street and Woodley Road or on 16th Street NW between Arkansas Avenue and Irving Street. That means the inbound lanes in the morning and the outbound lanes in the afternoon are likely to be more congested than normal.

On these other routes, the reversible lane rules will remain in effect Friday: Canal Road between Chain Bridge and Foxhall Road NW; Independence Avenue between Fourth Street SW and Second Street SE; Rock Creek Parkway.

Parking
Most parking regulations, including weekday rush-hour parking restrictions, expired meters, residential parking and street sweeping will be suspended on Friday, the D.C. Department of Public Works said. But the department will enforce parking restrictions Friday along the streetcar route on H Street and Benning Road NE.

Normal enforcement of all parking rules will resume on Saturday.

Parade
The parade is from 1 to 3 p.m. Saturday, starting from 800 Pennsylvania Ave. NW and moving west to the John A. Wilson Building at 1350 Pennsylvania Ave. NW.

Concert
The Emancipation Day concert is scheduled to start at 2:45 p.m. Saturday in Freedom Plaza, at 1355 Pennsylvania Ave. NW A fireworks show is scheduled for 9 p.m., after the concert.

D.C. police announced these street closings for the Saturday events. These streets will be closed from about 7:30 a.m to midnight: E Street NW from 14th Street to 13th Street NW; Pennsylvania Avenue NW from 14th Street to 12th Street NW; 13th Street NW from E Street to Pennsylvania Avenue NW.

These streets will be closed from 9:30 a.m. to 2 p.m: Indiana Avenue NW from Seventh Street to Third Street NW; Sixth Street NW from D Street to C Street NW.

These streets will be closed from noon to 2 p.m. for the parade: Pennsylvania Avenue NW from 14th Street to Fourth Street NW. All streets crossing Pennsylvania Avenue from 14th Street to Fourth Street will be closed between E Street and Constitution Avenue NW.

D.C. Department of Motor Vehicles
The District’s Department of Motor Vehicle services will be closed on Friday for the observance of the holiday.