London's public transport was an element of the bid which was scored poorly in the IOC's initial evaluation; however, they felt that if the improvements were delivered in time for the Games then London would cope. Transport for London (TfL) carried out numerous improvements in preparation for 2012, including the expansion of the London Overground's East London Line, upgrades to the Docklands Light Railway and the North London Line, and the introduction of a new "Javelin" high-speed rail service, using the Hitachi Corporation's "bullet" trains. The platforms at Stratford International station (which are at a height designed for Eurostar trains) will be temporarily raised to accommodate the Javelin trains. According to Network Rail, an additional 4,000 train services will run during the Games, and train operators will put on longer trains during the day.