I am not sure why you intend it to make a loss, even though I agree with you on benefits to the economy. Once a public transit system is convenient and is used

I am not sure why you intend it to make a loss, even though I agree with you on benefits to the economy. Once a public transit system is convenient and is used by a large percentage of the population, let's say 30-90%, then it will surely be profitable except if it's grossly mismanaged. Incidental tip: buy stocks of Hong Kong public transit companies, they're doing amazing.