For city centres absolutely. There is simply not enough space to build and expand roadways to accommodate that many daily commuters and many city centre dwellers would prefer not to have a car. I get where subways, buses, trains, taxis, bike share etc add value in those situations. I am thinking more city to city or suburb to city or suburb to suburb. 

I do think super fast light rail trains between specific destinations like two major cities also makes sense.  

grayruby

Construction_and_Engineering

The $13BN Plan to Fix the Deadliest Highway in Texas | The B1M

0xbitcoiner

Gotta be ready for the future, for sure, but I also think having some legit public transport, like a train or the subway, is key for the day-to-day grind.