A brief summary of how City Loop was built in 1970s, now in the eve of the Suburnan Rail Loop project.

I am surprised that a government site uses such a combative language "so-called experts, ...".

The City Loop – formally known as the Melbourne Underground Rail Loop – was a truly city-shaping infrastructure project. Planned and built despite strident criticism from so-called experts and academics, it transformed central Melbourne – below and above ground – laying the foundation for the vibrant city we enjoy today as residents, workers, visitors and commuters.

https://bigbuild.vic.gov.au/news/suburban-rail-loop/how-the-city-loop-transformed-melbourne-into-a-prosperous-city