LocalLink 89 is a bus route operated by the Maryland Transit Administration in Baltimore and its suburbs, mostly along Reisterstown Road.

The line currently runs from the Reisterstown Plaza Metro Subway Station to the Owings Mills Town Center.

59 designation was the Colgate Shuttle, a service that operated during rush hour from 1948 to 1952.

[2] But the Reisterstown Road corridor between Pikesville and Owings Mills has a history of being served by many other bus routes and streetcar lines.

5 Streetcar Line, which ran from Emory Grove to Patterson Park, providing all transit service than offered along any parts of Reisterstown Road.

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

7 bus line provided service on all parts of Reisterstown Road from Glyndon to Pennsylvania and North Avenues, then continued along Pennsylvania Avenue to downtown Baltimore and Canton along the same route as the present no.

The line started by running from Reisterstown Plaza to the Owings Mills Metro Subway Station at most times, with trips before 9 AM continuing to the Owings Mills Town Center.

The only section of Route M-15 that was not covered by any other bus lines was a branch of selected trips to Business Center at Owings Mills.

The schedules of all at the time, including Route M-9, matched those of Saturday service.