M23 (New York City bus)

m23
23rd Street Crosstown
An Chelsea Piers-bound M23 SBS bus at Tenth Avenue in 2018.
Overview
System	MTA New York City Bus
Operator	New York City Transit Authority
Garage	Michael J. Quill Depot
Vehicle	Nova Bus LFS articulated New Flyer Xcelsior XD60 New Flyer Xcelsior XE60
Livery	Select Bus Service
Route
Locale	Manhattan, New York, U.S.
Communities served	Chelsea, Flatiron District, Gramercy Park, Kips Bay, Stuyvesant Town–Peter Cooper Village
Start	Avenue C – 20th Street
Via	23rd Street
End	Chelsea Piers – 12th Avenue
Length	2.4 miles (3.9 km)[1] (westbound)
Service
Operates	24 hours[2]
Annual patronage	2,500,214 (2023)[3]
Transfers	Yes
Timetable	M23 SBS
Route map Legend Chelsea Piers – 12th Avenue  M23  12th Avenue / 24th Street 11th Avenue 10th Avenue 9th Avenue 8th Avenue ​​ 7th Avenue 6th Avenue ​ Broadway ​ Park Avenue South ​ 3rd Avenue 2nd Avenue 1st Avenue 1st Avenue / 20th Street 20th Street Loop / 20th Street Avenue C / 23rd Street East Side – Avenue C (20th Street)  M23  Legend Two-way stop One-way stop  M23  Terminal Subway connection PATH connection ← M22 ← M15 SBS  {{{system_nav}}}  M31→ M34 SBS →

The 23rd Street Crosstown is a surface transit line on 23rd Street in Manhattan, New York City. It currently hosts the M23 SBS bus route of the Metropolitan Transportation Authority (MTA)'s Regional Bus Operations. The M23 runs between Chelsea Piers, along the West Side Highway near 22nd Street, via 23rd Street, to Avenue C and 20th Street in Stuyvesant Town–Peter Cooper Village.

The route was originally the Twenty-third Street Railway, a street railway that was originally operated as horse cars and later electric traction. The company was chartered on January 29, 1872. The Twenty-third Street Railway was leased by numerous larger companies in the late 19th and early 20th century. The trolley line was replaced with bus service in 1936 and was originally numbered the M18-15 and the M26 before gaining the current M23 designation in 1989. On November 6, 2016, it became a Select Bus Service (SBS) route.