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Dyre Avenue LineEdit
The 3 designation was originally used for the IRT Dyre Avenue Line until it was converted to through service in 1957, though the equipment on the line did not bear numbers; it may have been used for the Dyre Avenue Shuttle, which ran nights and other times when through service did not run, after 1957. The Dyre Avenue Shuttle still runs during late night hours daily, but now carries the same number as the through service on the line, 3.
9 The 1/9 skip-stop service was introduced on August 26, 1989 to meet demands for more frequent service. At first, almost every station between 242nd Street–Van Cortlandt Park in the Bronx and 137th Street–City College in Manhattan was skipped. However, as time passed, many skipped stations became more utilized and were no longer skipped. Popularity and use rose to where the skip-stop service saved little or no time at all. By 1995, 1 trains only skipped three stops while 9 trains only skipped four. In early 2005, it was announced that the skip-stop service would be discontinued, and the 9 train made its final run on May 27.
At the end of the 9, skip-stop service assigned the following stations to the 1 only:
- 238th Street
- 215th Street
- Dyckman Street
- 157th Street
and the following stations to the 9 only:
- 225th Street–Marble Hill
- 207th Street
- 145th Street
Unless skip-stop or express service is brought back between 242nd and 137th or 96th Streets, the 9 designation will remain defunct.