The station is served by Metlink's electric multiple unit trains of the "Matangi" FP class.

However, in normal operation, southbound trains used the Ararino Street (western) platform and switched over to the down line south of the station.

[4] The 2010 – 2035 Regional Rail Plan (RRP) had proposed duplicating the track between Trentham and Upper Hutt in the 2011 – 2012 year,[5] but duplicating the track only commenced as part of the 2020-2021 Wellington Metro Rail Upgrade.

[9] On Saturday 22 March 1997, an evening northbound unit approaching Trentham passed the up home (29) signal at danger, which caused the alarms on the Sutherland Avenue level crossing immediately after the signal to only activate at the last second.

For an off-peak service when there was usually no conflicting traffic on the single line from Trentham to Upper Hutt, it was normal for the up home signal to change to clear once the barrier arms were down.

[11] Work on upgrading the station in 2020 for the double-tracking of the line to Upper Hutt started with a ceremony in December 2019.