as of 2001, edinburgh's public transport relied on buses and taxis; there were two major (and ten minor) city train stations, no light rail system, and the tram network had been decommissioned in the 1950s. the city centre straddles seven hills; there was an off-road cycle network although there were few dedicated routes in the city centre. city commuters could use park and ride schemes, or several bus companies, with the largest being lothian buses, formed in 2000 with the city of edinburgh council as its major shareholder, carrying 108 million passengers in 2006.