More roads push everything farther apart. Once everything is farther apart, you need more cars.
Geometry hates cars. You can't bargain with geometry. You can't tunnel your way out of this. You can't solve it with #VTOL sky-taxis. You can't fix it with #SelfDrivingCars whose car-to-car comms let them shave down their following distances. You need buses, subways and trams. You need #transit.