EDI/Bombardier Interurban Multiple Unit 100 series (IMU100)

The IMUs were introduced especially for the Gold Coast Railway in 1996, but they've never been restricted to that line, also running some Nambour services and, later, the Airport services.

The first sets arrived for the opening of the new line to Helensvale in 1996, with the rest following in 1997, making ten 3-car sets (IMU101-110) in all. Two sets can be coupled to make a 6-car train.

As with the EMUs and SMUs, these units are fully air conditioned with window tinting and woollen carpets. The IMUs are fitted with a mobility impaired access toilet, upgraded seating, luggage racks and storage spaces. Hearing impaired commuters are able to make use of the hearing aid loop to hear public address announcements. The IMUs are also fitted with full video surveillance and emergency communication systems.

Train drivers have access to full computerised information about the performance of the train, while other computers go about their task of controlling the GTO (gate turn-off) thyristor three phase traction converter and three phase electric traction motors.

The trains were produced by Walkers Ltd. Maryborough in association with Adtranz of Switzerland who provided the traction, auxiliary and computer control systems.

In 2001, the IMUs were upgraded with features for disabled commuters including painting the commuter doors yellow for the visually impaired and installation of longitudinal seating for easier wheelchair access.

The IMU100s have plenty of life left in them yet. In a 2021 answer to a question in Parliament, the Transport Minister put them down for retirement from 2038, alongside the SMU220s and IMU120s.