Sure--insofar as eventually, once they fail, the tunnels are already the correct size for a standard subway car for actual mass transit that can actually help p

Sure--insofar as eventually, once they fail, the tunnels are already the correct size for a standard subway car for actual mass transit that can actually help people. 'Cause the on-street traffic jams they would--not "might", check out donoteat01's stuff for a full breakdown--create are not exactly a better situation.