From the Stan's Cafe piece Of All the People in All the World which I saw in Birmingham in October 2003 and September 2008. These pictures are all to the same scale, and you have to take into account the height of the rice pile too.
How Many People Walk, Take a Train or a Taxi to Work in Birmingham
How Many People Cycle, Take a Bus or Metro to Work in Birmingham
How Many People Drive or Get a Lift to Work in Birmingham