I guess this number must take into account that the average city bus is driven a lot more than the average car. On a fuel consumption per km, not to mention pe

I guess this number must take into account that the average city bus is driven a lot more than the average car. On a fuel consumption per km, not to mention per km*passenger, it's way too much. Some number e.g. at https://en.wikipedia.org/wiki/Energy_efficiency_in_transport https://en.wikipedia.org/wiki/Energy_efficiency_in_transport