CityLink Red (abbreviated RD) is a MTA BaltimoreLink bus route operated by the Maryland Transit Administration in Baltimore and its suburbs.

[6] This extension mostly overlapped with Route 9, and this duplication of service during off-peak hours was criticized as costly.

Branches to the Towson State campus and Stella Maris, though originally proposed for elimination, continued to operate at this time.

The Lutherville extension on Saturdays was also discontinued, and on weekends, improved levels of this service were provided on Route 9.

In February 2006, all Route 9 were rerouted to International Circle due to complaints about the elimination of this branch.

[9] In February 2009, York, Pennsylvania's Rabbit Transit started providing service on its new Route 83S which connects to the light rail.

[10] As part of the BaltimoreLink transit overhaul to take place on June 18, 2017, Route 8 will be replaced in its entirety by CityLink Red.

Rather, its stops were limited to certain locations of importance, including transfer points to other bus lines, major landmarks, and other busy intersections selected by MTA.

[18] Route 48 was replaced by CityLink Red on June 18, 2017 as part of the BaltimoreLink transit overhaul program.