benny, a commuter bus capacity is about 70 people.

One can argue that the image is biased since it compares the maximum capacity of a bus to the average used capacity of the car. But then again, the maximum capacity of the bus is always available for commuters (the buses I use for commuting are usually packed), while the maximum capacity of a private car is never available (hitch hiking is usually illegal, car pooling is a closed process).

You also seem to be blindfolded by the emission trend. It is much easier to replace 1 bus with one that uses natural gas or non-fossile fuels than it is to make 45 car owners to buy a new more expensive car. If you remove the 45 cars from traffic, there is more space for people to live and the rest of the traffic spends less time idling their engines in gridlock (less emissions). There would be less traffic accidents and less traffic noise. The city would be quite a lot more pleasant if you removed the excess cars.

Bikes rule. Start congestion pricing now.