steel topped with reinforced glass. There are gaps covered with 70 cm grids between the tracks to allow for rainwater to fall down onto the rubble below and to soak into the soil so that the wooden piles originally driven into the former Kluuvi swamp will not decompose. The covered space is partly heated. Its front end is heated by the exhaust pipes of the district heating in front of the main door. The western wing was renovated into a commercial business centre in autumn 2003. The corridor surrounded by restaurants and business spaces leads from the main station hall to the end of the western wing, to the western platforms for commuter trains. At the same time, the retirement foundation of the VR Group commissioned a hotel and an office building to the northern edge of the Eliel Square, reaching over the platforms of the commuter trains. The building was designed by the architectural bureau Artto, Palo, Rossi & Tikka. It was built in 2003. The facade is made of glass, patinated copper and green granite. On 5 June 2005 the station was divided into eleven separate traffic spots, named Helsinki asema, Helsinki Länsisatama, Pasila alapiha, Pasila asema, Pasila tavara, Helsinki Sörnäinen, Käpylä, Oulunkylä, Ilmala asema, Ilmala ratapiha and Helsinki Kivihaka. The station was named Helsinki Central Station on 7 June 2010. The previous name was Helsinki Station. The timetable displays at the station were completely renovated in November 2015. The old LCD displays were replaced with fully modifiable TFT displays. A new perpendicular underpass tunnel named Kaisantunneli, 220 metres long and four metres wide, leading from the Kaisaniemi park to Töölönlahdenkatu, is under construction and scheduled to be completed in 2023. This pedestrian tunnel will decrease bicycle traffic at the Eliel Square and on the Kaivokatu street and will make access to the station platforms easier. Modern times In the 1960s, the underground Asematunneli pedestrian underpass and underground shopping centre complex was built south of the station. The first surveillance cameras in the station hall were installed in the spring of 1968. The first electric train arrived at the station on 13 January 1969. After testing, regular electric train traffic was started between Helsinki and Kirkkonummi on 26 January 1969. The Rautatientori metro station, connected to the railway station via Asematunneli, was built part of the Helsinki Metro construction work. It was one of the original metro stations,