Public transit isn't sustainable either; it's about public good paid for by tax dollars. It usually costs far more to run buses in suburban areas than they bring in revenue.
IIRC, there were Amtrak routes in the Northeast that became very popular, and the gov't was bleeding money increasing the amount of service because every ride was subsidized by something like $10-$20/ride.
IIRC, there were Amtrak routes in the Northeast that became very popular, and the gov't was bleeding money increasing the amount of service because every ride was subsidized by something like $10-$20/ride.