M42 (New York City bus)

The M42 bus route constitutes a public transit line in Manhattan, New York City. The M42 operates between United Nations and Circle Line Sightseeing Cruises, serving as a 42nd Street crosstown.

Current route
It begins at 12th Avenue, and eastbound buses turn onto 42nd Street, whereas westbound buses use 12th Avenue and West 43rd Street to access the terminus. The M42 stays on West and East 42nd Street until FDR Drive. Eastbound buses continue to FDR Drive, and use the service road to access East 41st Street, where they terminate. Westbound buses use First Avenue to access East 42nd Street, where they head back to the West Side.

History
The M42 was originally Surface Transportation Corporation bus route M106. This route replaced Third Avenue Railway's 42nd Street Crosstown Line streetcar on November 17, 1946.

This route was renumbered the M42 in April 1986.

Service to Javits Center was discontinued on June 27, 2010, due to a budget crisis and low ridership.