Question: Which Australian south-north railway has an end point in the smallest Australian capital city?
Context: Filderstadt station (called Bernhausen station until 28 May 1983) is the end point of the railway from Stuttgart-Rohr.  Line S 2 of the Stuttgart S-Bahn terminates here. The Nuremberg-Bamberg line is a German railway connecting the Bavarian city of Nuremberg with Bamberg via Fürth, Erlangen, Forchheim.  It is part of the northern section of the Ludwig South-North Railway.  It runs as one of the important German transport routes along the Regnitz Valley.  Since German reunification the line has become important for long distance services.  This is expected to increase once the Nuremberg–Erfurt high-speed line is opened. The Atlanta, Birmingham and Atlantic Railway was formed in 1914 as a reorganization of the Atlanta, Birmingham and Atlantic Railroad, which had been created in 1905 to purchase the Atlantic and Birmingham Railway and extend its track into Birmingham, Alabama, from an end point at Montezuma, Georgia. Faulder is a railway point located in British Columbia, Canada, situated in a large valley ten kilometers west of the town of Summerland.  This is also the end point of the Kettle Valley Steam Railway.  Named after Evelyn Robert Faulder, it consists of many large acreages and agricultural farms. is the capital city of the Northern Territory of Australia.  Situated on the Timor Sea, Darwin is the largest city in the sparsely populated Northern Territory, with a population of 142,300.  It is the smallest and most northerly of the Australian capital cities, and acts as the Top End's regional centre. Nanjing West Railway Station () is a railway station in Nanjing, China.  Originally named Nanjing Railway Station, it was first opened in 1908.  as the end point of the Shanghai–Nanjing Railway (a section of the Beijing–Shanghai Railway). The War Department halt was an informal railway station on the Romney, Hythe and Dymchurch Railway in Kent, England.  Over the 15 years that the station was open, its location is believed to have moved several times.  Details are scarce as this was a secret military installation, but the end of the War Department branch line moved as building work (see below) moved onto new stages.  When the installation closed in 1945 the railway company took over the line for freight shipment of ballast.  Again, the end point of the line changed several times as the exact location of extraction of ballast changed, until closure of the branch in 1951.  The locations of the halt are now under water owing to subsequent commercial extractions and flooding of the ballast pits. The Australian Capital Territory Legislative Assembly (formally, the Legislative Assembly for the Australian Capital Territory) is the unicameral legislature of the Australian Capital Territory (ACT).  It sits in the Legislative Assembly Building located on Civic Square, close to the centre of the city of Canberra. The Central Corridor is a transport and trading route located in East and Central Africa.  Its end point is the Tanzanian port city of Dar es Salaam, where it connects to the rest of the world via shipping.  From Dar es Salaam, the corridor runs inland, serving the Tanzanian interior including its capital Dodoma and second city of Mwanza, as well as landlocked Rwanda and Burundi, and the eastern part of the Democratic Republic of the Congo.  This route consists uses Tanzania's Central Line as well as connecting road networks. The Adelaide–Darwin railway is a south-north transcontinental railway in Australia, between the cities of Adelaide, South Australia and Darwin, Northern Territory.  Between 2000-2004 the line was extended from Alice Springs to Darwin as a Build, Own, Operate and Transfer back (BOOT) project by the AustralAsia Rail Corporation.  This replaced the former narrow gauge line from Darwin to Larrimah and the narrow gauge/standard gauge Central Australia Railway from Port Augusta to Alice Springs which used a different route up to 200 km to the east.
Answer: Adelaide–Darwin railway