> a greyhound bus was 4x more efficient than the car That's a good scenario for buses because Grayhound can size buses appropriately and change the frequency.

> a greyhound bus was 4x more efficient than the car That's a good scenario for buses because Grayhound can size buses appropriately and change the frequency. The number for buses within a city is trickier because you have some packed commute buses, and some with 3 passengers at 10 PM.