[xnx]

Because roads are a shared resource used by everyone (even non car owners) Uber/Lyft's portion is small and covered by taxes they already pay.

[hnav]

The point is that the cost of the road infrastructure isn't accounted for, not to mention the externality of having a half a million cars on the road to move 750k people. Rideshare is slipstreaming in the subsidized flow of cars.