time, seven new floors were built into the clock tower for the use of the kitchen department, and storage and social spaces were built in the underground floors that had been almost completely unused. Ticket sales were opened in the former third class restaurant and waiting hall. 1960s to 1990s A station tunnel was built underneath Kaivokatu in 1967, with stairs leading to the tunnel from the central hall of the station. Electric train traffic started at the Helsinki railway station on 26 January 1969. From 1978 to 1979, spaces for arriving baggage were built into the underground floor of the western wings, freeing the space in the central hall for a public thoroughfare. The last scheduled train with a steam locomotive left Helsinki on 31 December 1970. Regular passenger train traffic with Diesel-powered locomotives ended on 11 August 1996. Today all trains at the Helsinki railway station use electric power. The kiosks at the kiosk hall were renovated in the early 1980s according to plans by interior decoration architect Antti Nurmesniemi. 2000s The perpendicular underpass from the corner of the Kaisaniemi park to the corner of the Eliel Square at the end of the western wing of the station was built from 1999 to 2000. It was designed by architect Jarmo Maunula. The tunnel is 185 metres long and over seven metres wide. It connects to all tracks at the station with stairs and elevators. The walls are panelled, which helps in cleaning away graffiti and other defacements. An underground parking garage with 480 places was built to the west of the station, in place of the former cargo railway yard, with the Eliel Square bus terminal on top of it. It was opened for use in October 2000. The new platform tracks 17 to 19 were taken into use in August 2000, when the tracks at the passenger station reached their current form. For a long time, the Helsinki railway station was one of the few large railway stations in Europe where passengers boarded the trains under the open sky. The main tracks were supposed to be covered right from the start, but the glass roof was only built in 2001. A design contest was held for it, which was won by Esa Piironen's design in 1994. The glass roof cost about 56 million Finnish markka. The roof is about 165 metres long. It is made of painted