LocalLink 87 is a bus route operated by the Maryland Transit Administration in the suburbs of Baltimore.

56 designation was once previously used in Baltimore transit history for a line that operated from Murray Hill (near Rodgers Forge) to Bedford Square (near Charles Village).

5 Streetcar Line, which ran from Emory Grove to Patterson Park, providing transit along all parts of Reisterstown Road in Baltimore County.

[5] Service between Pikesville and Emory Grove was provided by Bus Route M (no relationship to M-lines).

[6] On June 18, 1984, in conjunction with the opening of the Baltimore Metro Subway, several bus routes in the northwest section of the Baltimore area, including Route 7, were shortened, and portions of them were replaced with various feeder buses that brought riders into various Metro stations.

[8] In 1999, the destination signs on Route M-9 were changed from "Reisterstown" to "Glyndon" to avoid confusion caused by buses along Painters Mill Road and at the Owings Mills Metro Station and Town Center that were traveling in opposite directions (southbound buses had flashed between "Reisterstown" and Plaza Station.".

For a brief period of time, the trips that once operated to Chartley were laying over at a loop near a Food Lion supermarket in Reisterstown, but due to complaints from residents of this neighborhood, these trips were later rerouted to the Glyndon loop along Hanover Pike where all other buses lay over.

This change, which went into effect on February 17, 2008, was planned in order to improve schedule adherence on both routes.