end of the line. Log and other wood-related traffic is moved between Wellington and Waingawa, just south of Masterton, with one overnight and one daylight return service on weekdays, and a daylight service operates both weekend days. Two freight trains operate from Palmerston North to Pahiatua and return on weekdays, the first in the early hours of the morning and the second in the afternoon. No freights currently operate regularly at weekends. KiwiRail ceased running timetabled revenue services on the Masterton–Pahiatua section of the line in February 2015, transferring the Sunday Wellington to Palmerston North via Woodville run to the NIMT. However, they have undertaken to keep it open and maintain it to an operational standard, in part because it is still in use by heritage operators, particularly the Pahiatua Railcar Society and Steam Incorporated. Rolling stock In the late nineteenth century, the first members of the K class to operate in the North Island were transferred from the South Island to work the Napier Express. They were augmented by members of the M and N classes. In the twentieth century, typical locomotives included members of the A and AB class. The Rimutaka Incline was almost always operated by the six members of the H class built specifically for it. In 1906 E 66 was built for the Incline but did not prove as successful as the six H locomotives and was retired in 1917. When the Rimutaka Tunnel opened in November 1955, the Wairarapa Line became the first in New Zealand to be fully dieselised as steam locomotives were unable to pass through the tunnel. Initially, DE and DG class diesels were employed, and they were soon joined by the DA class. Until 1967, the Wairarapa Line was the only way DA class locomotives could access Wellington due to tunnels south of Paekakariki being too small. In the 1980s, the DG class had been fully withdrawn and the DA class in the process of withdrawal or conversion to the DC class; accordingly motive power on the Wairarapa Line changed. Until 2015, the DC class was the mainstay of the Wairarapa line south of Masterton, with locomotives of the DBR, DF/DFT and DX classes occasionally used. In July 2015, the DFT class took over services on the line. As of November 2021, rolling stock regularly used on the Wairarapa Line include: Future Improvements planned for the Wairarapa Line beyond Upper