A short branch was later built along Stuyvesant Street and Astor Place to end at Broadway in NoHo.
Buses were substituted for streetcars by the East Side Omnibus Corporation on June 25, 1933.
Limited-stop service ran every six minutes on weekdays, heading southbound in the morning, between 7:12 and 9:21 a.m., and northbound in the afternoon, between 4:12 and 6:11 p.m.[6] These buses were identified by signs on the lower right side of the windshield.
[9] In June 2002 as part of an outside study, the First/Second Avenues corridor was identified for the implementation of bus rapid transit (BRT) service, due to heavy ridership and slow travel speeds on the corridor.
[13] In late 2004, the Metropolitan Transportation Authority (MTA) and the New York City Department of Transportation selected the route as one of the candidates for bus rapid transit service, along with Fordham Road (since implemented), Nostrand Avenue, Merrick Boulevard, and Hylan Boulevard.
[21] The M15 runs between South Ferry in the Financial District and 126th Street in East Harlem.
By then, the MTA had discontinued service to City Hall due to budget cuts.