consist of two-electric multiple units, which serve as either a driving car or trailer car depending on the direction of travel. They are equipped with Linear Induction Motor (LIM) propulsion technology which allows for operation on tighter curves, with less noise and greatly reduced wheel and track wear. The plating in between the running rails is used for accelerating and decelerating the train; additionally, the reaction plate is semi-magnetised, which pulls the train along and helps it slow down. The ART is completely automated and operates without drivers, stopping at stations for a limited amount of time. Nevertheless, manual override control panels are provided at each end of the trains for use in an event of an emergency. The technology is essentially identical to that of the Vancouver SkyTrain, which operates in very similar environments. The interior of the ART, like its Ampang and Sri Petaling Lines' counterparts, consists of plastic seating aligned sideways towards the sides of the train, with one foldable seats for passengers at the end of the cars for wheelchair, and spacing in the middle for standing occupants. Since its launch in 1998, the ART rolling stock has remained relatively unchanged; only more holding straps have been added and the labeling has been modified from Putra-LRT to RapidKL. Some of the rolling stock has the majority of the seats removed for added passenger capacity during rush hours. 4-car 2009 Innovia ART 200 On 13 October 2006, Syarikat Prasarana Negara signed an agreement with Bombardier HARTASUMA Consortium for the purchase of 88 Innovia ART 200 cars (22 train sets of 4-cars), with an option for another 13, for RM1.2 billion. The 22 train sets, initially targeted to be delivered from August 2008 onwards, would have four cars each, boosting the carrying capacity of the fleet by 1,500 people. On 8 October 2007, Syarikat Prasarana Negara exercised its option to purchase an additional 52 Innovia ART 200 cars (13 train sets of 4-cars) for €71 million, expected to be delivered in 2010. Although the trains were expected to arrive in August 2008, the manufacturer delayed the delivery to November 2008. Rapid Rail said that the trains will only be usable by September 2009 after having sufficient rolling stocks, power line upgrades, and safety testing. Transport Minister Datuk Seri Ong Tee Keat said in Parliament that the new trains would begin operations by December 2009. However, in July 2009,