Subway riders in the Bronx might see their plans derailed this week as the Metropolitan Transportation Authority brings its "Fastrack" overnight maintenance work to the Grand Concourse B and D lines.

Starting Monday night, service will be suspended on a stretch of the B and D lines between 10 p.m. and 5 a.m. for four consecutive nights, wrapping up Friday morning.

There will be no service between Norwood-205th Street and 161st Street-Yankee Stadium in both directions.

Free shuttle buses will run between 205th Street and the Mosholu Parkway stop on the 4 line.

A transfer is also available between 4 and D trains at 161st Street.

For more information, visit MTA.info.