It's not just about money. If the trains operate at a low capacity, they will be far less green than current modes of transportation. You'd have to incentivize people to use it by raising tolls and taxing cars, gas, flight and buses more than they are now. Not happening.
That's why many metro buses are far more inefficient and pollute more than cars. They simply don't carry enough people to justify their huge amount of pollution. Now imagine the heavy equipment and coal burning used to build and run the rail, and combine it with limited use. Other modes of travel quickly eclipse it on the green scale.
Last edited by Silock; 12-31-2012 at 10:25 AM..