derailed when travelling too fast around a curve, and the Cairns Tilt Train derailment in Queensland, which occurred in similar circumstances, the State Government announced in December 2004 that the Train Protection & Warning System (TPWS) would be installed on Regional Fast Rail lines and the VLocity trains. In August 2005, the State Government commissioned an investigation into the fitting of seat belts on the trains, although the concept was considered potentially expensive and technically challenging. Testing revealed noise levels were too high in the cabin, delaying the introduction of the trains into service while the completed sets were modified. Into service The VLocity was introduced into service on the Ballarat line on 22 December 2005, with Bracks and Transport Minister Peter Batchelor travelling on the inaugural service from Southern Cross station. An unveiling ceremony was held at Ballarat and the train returned as a regular service. Services on the Geelong and Bendigo lines followed on 3 February 2006 and 24 February 2006 respectively. Services to Traralgon and Seymour were introduced in September 2006. A timetable allowing the VLocity to operate at its design speed was introduced on 3 September, despite allegations by the State Opposition of ongoing issues with the TPWS. In addition, the Ararat and Echuca services are operated by VLocitys. From 2010, one Ballarat line service each day was extended to Maryborough. In 2005, the VLocity received an Australian Design Award, the first rail vehicle to do so, as well as an accolade from Engineers Australia. On 10 November 2008, seven-carriage-long VLocity trains (2x 2 carriage + 1x 3 carriage sets) commenced regular operation on peak-hour Geelong line services. Previously, the longest trains were six carriages (3x 2 carriage sets). With the introduction of fixed 3 carriage sets it was no longer possible to run 7 carriage trains but as of June 2022 limited 9 carriage trains run to Wyndham Vale in peak times Additions to the fleet After the initial order of 38 units, a further two VLocity units were later ordered to bring the total to 40, along with 22 new intermediate trailers to be inserted in the middle of existing VLocity sets. The first 14 were promised during the 2006 State Election, and the order was placed in December the same year. The order for the next eight was announced on 12 October 2007. In July 2008, the State Government ordered nine new three-car