[Intermernet]

Sydney is just about to roll out a new (mostly) sub-terrainian train system [1] which would be an interesting demo for hyperloop tech, except for the large numbers of stops being incorporated into the trip. Despite this problem, the costings should be an example of how much it would cost to build new, tunnel based, infrastructure through similar areas (admittedly, Sydney is mostly soft sandstone).

[1]: http://sydneymetro.info/

[shawabawa3]

Hyperloop is designed to be above-ground, which is significantly cheaper. Also, musk's original route plan has it stopping outside city-centers (presumably to keep the cost-estimate down)