motor vehicles and its sprawling road network has been criticised by proponents of mass public transport and high density housing. The Light Horse Interchange in western Sydney is the largest in the southern hemisphere. There can be up to 350,000 cars using Sydney's roads simultaneously during peak hour, leading to significant traffic congestion. 84.9% of Sydney households own a motor vehicle and 46.5% own two or more. Car dependency is an ongoing issue in Sydney–of people who travel to work, 58.4% use a car, 9.1% catch a train, 5.2% take a bus, and 4.1% walk. In contrast, only 25.2% of working residents in the City of Sydney use a car, whilst 15.8% take a train, 13.3% use a bus, and 25.3% walk. With a rate of 26.3%, Sydney has the highest utilisation of public transport for travel to work of any Australian capital city. The CBD features a series of alleyways and lanes that provide off-street vehicular access to city buildings and as well as pedestrian routes through city buildings. Buses Bus services today are conducted by private operators under contract to Transport for NSW. Integrated tickets called Opal cards operate on bus routes. In total, nearly 225 million boardings were recorded across the bus network NightRide is a nightly bus service that operate between midnight and 5am, also replacing trains for most of this period. Trams and light rail Sydney once had one of the largest tram networks in the British Empire after London. It served routes covering . The internal combustion engine made buses more flexible than trams and consequently more popular, leading to the progressive closure of the tram network with the final tram operating in 1961. From 1930 there were 612 buses across Sydney carrying 90 million passengers per annum. In 1997, the Inner West Light Rail opened between Central station and Wentworth Park. It was extended to Lilyfield in 2000 and then Dulwich Hill in 2014. It links the Inner West and Darling Harbour with Central station and facilitated 9.1 million journeys in the 2016–17 financial year. A second, the CBD and South East Light Rail line serving the CBD and south-eastern suburbs opened partially in December 2019 and the remainder in April 2020. A light rail line serving Western Sydney has also been announced, due to open in 2023. Trains Established in 1906, Central station is the largest and busiest railway station in the