IRT Jerome Avenue Line

IRT Jerome Avenue Line
The 4 train serves the entire IRT Jerome Avenue Line at all times. One station is also served by the 5 train.
Overview
Type	Rapid transit
System	New York City Subway
Termini	Woodlawn 138th Street – Grand Concourse
Stations	14
Daily ridership	242,460
Operation
Opened	1917–1918
Owner	City of New York
Operator(s)	New York City Transit Authority
Character	Underground (South of Yankee Stadium) Elevated (Most of The Bronx)
Technical
Number of tracks	2-3
Track gauge	4 ft 8 1⁄2 in (1,435 mm)
Electrification	600V DC third rail

The IRT Jerome Avenue Line, also unofficially known as IRT Woodlawn Line, is an A Division New York City Subway line mostly along Jerome Avenue in the Bronx. Originally an Interborough Rapid Transit Company-operated route, it was built as part of the Dual Contracts expansion and opened in 1917 and 1918. It is both elevated and underground with 161st Street–Yankee Stadium being the southernmost elevated station. The line has three tracks from south of the Woodlawn station to the 138th Street–Grand Concourse station. The Woodlawn Line also has a connection to the Jerome Yard, where 4 trains are stored, just north of the Bedford Park Boulevard–Lehman College station.

The Jerome Avenue Line is served casually by the 4 train at all times, except for the 138th Street – Grand Concourse station, as well as select trains run express non stop between 167 Streets and Burnside Avenue or from 149th Street Grand Concourse to Burnside Avenue which the 4 serves all times except rush hours in the peak direction, and the 5 train's sole stop is 138th Street at all times except late nights.

As part of a pilot program to evaluate express service on the line, from June 8, 2009 to June 26, 2009, the MTA operated four trains southbound on the express track between 7:15 AM and 8:00 AM. The trains stopped at Woodlawn, Mosholu Parkway, Burnside Avenue, and 149th Street – Grand Concourse, then continued down the normal route. From October 26, 2009, to December 11, 2009, another pilot program to run express service ran, this time adding Bedford Park Boulevard – Lehman College as an additional stop. A fifth train had also been added and trains now run every 20 minutes from 7:00am to 8:20am.