The Crossrail programme required the construction of 10 new stations; seven of them below ground in the central section and three on the existing network. The programme also included the enhancement of 31 existing stations. Each station platform is around 240 metres long to accommodate the 200-metre-long, nine-carriage trains. A range of complex IT systems support management of the stations, including keeping passengers safe, and ensuring that they can move efficiently through the stations.