The V/Line VLocity, sometimes called the VLocity 160, is a diesel multiple unit train built by Bombardier Transportation (later Alstom) in Dandenong for V/Line, the regional rail operator in Victoria. Continuously in production since 2003, the VLocity is the highest-speed train in the V/Line fleet, with a top speed of . As of October 2022, 100 3-car sets are in revenue service, 2 collision damaged sets are in storage, and 16 more are under construction on the current order. History Design origins and testing To honour a commitment made when it was awarded the V/Line franchise, National Express requested tenders in early 2000 for 29 two-carriage diesel multiple units. The order, which coincided with the Regional Fast Rail project then being undertaken by the state government, was awarded to Adtranz's Dandenong factory in mid-November with a value of . The contract was extended to 38 two-car units and an initial fifteen-year maintenance contract. By the time the first was delivered, the V/Line franchise had reverted to the state government, while Adtranz had been taken over by Bombardier Transportation. The design was an evolution of the Xplorer/Endeavour railcars. Although Bombardier originally intended to use the same body shell design as the Endeavour, difficulties with the aerodynamic drag characteristics of this shape for the intended operational speed of the VLocity led to a complete redesign of the train body. Ultimately, the VLocity was designed concurrently with the B series being developed for Transperth as an electric multiple unit, resulting in a number of shared design elements. The original plan was for the 29 sets to be fitted with 2+3 seating, for a total capacity of 173 passengers per two-carriage set. However, in February 2003, that was changed to 144 seats in a 2+2 formation. In 2003, it was announced that the units would be built in Bombardier's Dandenong factory, with the bogies to be constructed at Bombardier's Derby Litchurch Lane Works in England, and the control system to be supplied by Bombardier's plant in Västerås, Sweden. The first unit was completed in July 2004, and testing began shortly after. The trains were tested at for the first time on 17 September, when Premier Steve Bracks joined a test run along a route from Warragul to Moe. Safety improvements were suggested at various stages in the development of the VLocity and, following the Waterfall accident in New South Wales, in which a train