If the rider was driving their own car, there would be two cars on the road instead of one. One is still less than two, or, has Common Core Math changed that...
“If the rider was driving their own car, there would be two cars on the road instead of one.”
Not true.
If the rider was driving his own car, it would add one car to the road. If that rider was in his own car, there would not be the demand for the ride sharing car to be on the road.