The Maryland Transportation Authority says it has had to close two of the three lanes of northbound Maryland 295 on the way into Baltimore for emergency repairs to joints on the bridge that passes over Interstate 895 near the Beltway. The left lane will remain open.

The repairs will continue through the evening rush hour but are expected to be completed by 5 a.m., according to the authority.

The agency suggested that motorists coming north into Baltimore get off 295 at the Beltway and take it west to Interstate 95. It noted that the right lane of northbound 95 is also expected to close between 7 p.m. and 5 a.m.

Teri Moss, an authority spokeswoman, said concrete on the bridge became separated from the joint as a result of wear and tear. She said the damage was not believed to be heat-related.

In some respects, the timing was fortunate. The closings will not affect outbound traffic on Russell Street and 295 during the evening rush hour, and there is no Orioles game at Camden Yards tonight.