Traffic is slow through downtown Baltimore as University of Maryland, Baltimore County holds graduation ceremonies at the 1st Mariner Arena.
At mid-day, there was congestion on inbound Interstate 95, Interstate 395 and Russell Street, said Adrienne Barnes, a spokeswoman for the city Department of Transportation.
"We're asking motorists to avoid the area, to use alternate routes if you don't have to travel in that stretch of downtown," she said.
Barnes did not have information about how long the delays might persist. The graduation was scheduled to begin at 1 p.m.