Of these regions, bus routes are classified with three-digit route numbers. Currently, Sydney has two operating T-Ways: The Liverpool-Parramatta T-way opened in 2003 The North-West T-way opened in 2007 Additional bus networks operate in the Outer Sydney region, which include: Blue Mountains Newcastle Rail Commuter Rail Suburban rail services within Sydney are provided by Sydney Trains. Sydney's suburban commuter rail service consists of a complex system of integrated railway lines, of which most run through the city underground. All city trains consist of eight double deck carriages with two crew members on board–driver and guard. Fares are calculated on the basis of distance travelled. Trains run from 4am until around 1am seven days a week with Nightride bus services covering the network throughout the night when trains are not operating. NSW TrainLink interurban trains operate from Central railway station to the Illawarra, Southern Highlands, Blue Mountains, Central Coast and Newcastle. This station is also the terminus for NSW TrainLink's long-distance trains to numerous destinations in country New South Wales as well as Melbourne and Brisbane. The Indian Pacific also operates to Adelaide and Perth. Rapid Transit (Metro) Sydney Metro is a rapid transit line that opened in 2019 and runs from Sydney's north-western suburbs to its terminus at Chatswood, a major transport interchange. Construction is currently underway for the second phase of the line, where it will eventually pass through the city and then travel south-west to Bankstown. It currently consists of 13 stations and of twin tracks, mostly underground. Work is progressing to extend this line from Chatswood to Bankstown, running under Sydney Harbour and the CBD with a scheduled 2024 completion. When completed, this line will have of twin tracks and 31 stations in total. Sydney is the first and currently the only Australian city with a fully automated rapid transit metro system. Despite extensive plans for an underground network in the past, disputes over privatisation and funding had hampered government approval, delaying its inception. In spite of difficulties getting the project off the ground, government approval for what was initially known as the North West Rail Link, Sydney's first underground metro, was given in 2013. Freight Freight services operate over most of the suburban railway lines in Sydney, however due to the high frequency of passenger services and the lack of freight only tracks, there is a curfew on freight movements during peak hours. The major interstate