put into service in 1948. The Broadway route to 242nd Street became known as the 1. On June 12, 1949, 137th Street to South Ferry Sunday local trains were discontinued, but were resumed on March 5, 1950, at which time Sunday service was also rerouted to New Lots Avenue. On March 15, 1954, weekend 137th Street to South Ferry local trains were once again discontinued, and simultaneously weekend Brooklyn trains were rerouted to Flatbush Avenue. An attempt was made to extend express service further north on January 14, 1955, when Broadway express trains, or every other 1 train, began running express between 137th and 96th Streets in the peak direction, between 7:32 and 8:33 a.m., and between 5:10 and 5:59 p.m.. Express trains terminated at 242nd Street. On January 17, 1955, the bottleneck at 96th Street forced some southbound 1 trains that ran express south of 96th Street to remain on the local track at 96th Street, skipping local stops before switching to the express track at 72nd Street. Broadway express service between 137th and 96th Street proved unsuccessful, and ended on June 28, 1956. Meanwhile, in Brooklyn, weekday trains were rerouted to Flatbush Avenue and evening 137th Street to South Ferry local trains were discontinued. West Side improvement Under a $100-million rebuilding program, increased and lengthened service was implemented during peak hours on the 1 train. Trains then stopped using the switches north of 96th Street, except for General Orders, when temporary construction-related service diversions were in effect. Once most of the work on the project was completed on February 6, 1959, all 1 trains became local, running at an increased frequency, and all 2 and 3 trains became express, and eight-car local trains began operation. 1 trains began to run between 242nd Street and South Ferry at all times. Trains began to be branded as Hi-Speed Locals, being as fast as the old express service with new R21 and R22 subway cars on the route. During rush hours in the peak direction, alternate trains from 242nd Street only stopped at 168th Street while running express from Dyckman to 137th Streets in the direction of heavy traffic. The bypassed stations were served by locals originating from Dyckman Street. By Marcy 26, 1959, 15,000 riders switched from using express trains to the Hi-Speed Locals during rush hours, increasing riders on local trains south of 96th Street by 75 percent. Evening