It is though? Are you gonna open a second unconnected subway system in new York and compete with them? That's always the question for a natural monopoly I thought.
Youre gonna have another company digging a second set of tunnels?
Does it make any sense whatsoever to have two?
> Are you gonna open a second unconnected subway system in new York and compete with them?
Yes thats how it works in Tokyo. They get land, build stations, then dig the tunnels. Their profit comes from fares and rents around the stations that they own.