 The Wairarapa Line had a number of lasts for railway signalling in New Zealand

Prior to the Trentham–Upper Hutt–Featherston section being transferred to Train Control in February 2007, this was the last section with CTC controlled by a signalman.Part-time signal boxes remained at Petone (weekday peak and inter-peak) and at Taita (weekday peak) until December 2013 and July 2014 respectively, when signalling was switched to Train Control in central Wellington.Masterton is a unique signalling arrangement with Track Warrant Control ending at 'TWC Ends' boards north of the two-position home signal, which allows shunting movements to be carried out without the need for a Track Warrant.