BALTIMORE, MD — Traffic is expected to be so heavy in downtown Baltimore Thursday, Sept. 12, that transportation officials are encouraging people to avoid some areas altogether. Congestion, road closures and delays are possible from 4 to 8:30 p.m.

President Donald Trump will head to Baltimore Thursday to deliver an address at the GOP conference. The event will be at the Baltimore Marriott Waterfront hotel on Aliceanna Street in Harbor East. It is organized by the Congressional Institute and House Republican Conference.

Those downtown after 4 p.m. should avoid the area south of Baltimore Street between Martin Luther King Boulevard and Central Avenue, the Baltimore Department of Transportation advised.

This is the area that Baltimore's Office of Emergency Management said will be impacted:

Employees downtown should start their commute before 4 p.m. to avoid congestion, according to the Baltimore City Department of Transportation.

Baseball fans headed to the Orioles game at Camden Yards are "strongly encouraged" to use mass transit such as buses, light trail, subway and the Charm City Circulator.

The O's play the L.A. Dodgers at 7:15 p.m.

Throughout the afternoon, Transportation Enforcement Officers will be deployed to help facilitate the movement of traffic, according to the Baltimore City Department of Transportation. 

Temporary intersection closures may occur in the afternoon and early evening hours.

Heavy traffic volumes are expected to begin after 4 p.m. and last until 8:30 p.m., officials said.

Those traveling downtown should allow additional travel time Thursday, Sept. 12.