The Mary Valley railway line was a branch line of the North Coast railway line, which branched west at Monkland (just south of Gympie) and continued to Brooloo in the upper Mary Valley. It was constructed between https://9apps.ooo/ 1911 and April 1915 to facilitate closer settlement of the Mary River valley. The line reached Kandanga railway station in February 1914 and the terminus of Brooloo in April 1915. The line would run for about 45km (27.9mi).
ok.. We will need more information.. when is the route set? what rolling stock can we expect to drive on this route? could you also provide a map of said route please?
The chances though of DTG doing a modern Oz route let alone a historical one are pretty much slim to none, sadly.
The only way I see an Australian route being done is by a 3rd party. We never had an Aussie route in tsc my guess is if were to happen it most likely be union workshop making it.