The two middle tracks, not next to either platform, are used by through trains.

First, the middle track was taken out of service and pulled up.

Last year, the new middle track was ready for service.

The middle track, not adjacent to either platform, is used only by express trains.

The middle track is generally not used in revenue service.

This station has two side platforms and three tracks with the middle track not used in revenue service.

The middle track from here south to 103rd Street is unused for revenue service.

The middle track in the lower level station was to be used for short turns from either direction depending on the service pattern.

At these times, it short turns on the middle track.

The middle track, which starts just north of the station, is generally not used in revenue service.