In April 2019, a Select Bus Service line was expected to run along 14th Street to provide alternate service during the original L train shutdown plan. Service was expected to operate from Ninth Avenue to Avenue C, then turn north along Avenue C to 20th Street, where there would be a ferry transfer. This route was to be another branch supplementing the existing M14A/D designation, but the existing lines would not be converted to Select Bus Service. To facilitate bus trips on the M14 corridor, the 14th Street busway would be implemented, turning parts of 14th Street into a bus-only street during rush hours. The Select Bus Service route was to be implemented by January 6, 2019, three months before the tunnel was set to shut down. It was to initially run with five stops in each direction between First Avenue/14th Street and 10th Avenue/14th Street. Local service on the M14A and M14D would be retained with minor modifications. One or two weeks before the tunnel would originally close, the M14 SBS was to be extended to Stuyvesant Cove. The M14A/D local and the M14 SBS would be able to serve a combined 84,000 passengers every hour, with a bus every two minutes during rush hours. During late night hours, the M14 SBS would be replaced by the route to the Bedford Avenue station in Brooklyn. Once the 14th Street Tunnel has re-opened, some version of M14 SBS service was to continue to operate.