Metallostroy, near Saint Petersburg, is home to the maintenance depot where Russia's high-speed Sapsan train is serviced. One of the most advanced maintenance facilities in the world, the depot operates around the clock – thus ensuring the Sapsan's more than 99 percent availability. Service personnel at Metallostroy employ state-of-the-art technologies. For example, touch screens displaying each train's condition and the work still to be done are distributed in the track area. Technicians use these screens to view their work packages and to report the time needed and the materials required to complete their tasks. Russia's high-speed rail transportation system currently has no operational reserve. This means that all eight Sapsan trains are in operation every day on the stretch between Moscow and Saint Petersburg. For this reason, maintenance has to be carried out mainly at night – outside normal operating times. In addition, the trains must be continuously monitored during daily operation. A large quantity of data reflecting each train's current condition is collected in the process, making it possible to identify abnormalities and fault patterns in time to prevent malfunctions before they occur.