Despite all the discussion about the various types of wheeled transportation, the subject, or at least the primary subject, for me is the man with the umbrella. For me, the photo is a mismatch of subject and the story intended to be told.
However, the image still works for me because it very effectively tells the story of four methods of individuals' mobility. I especially like that that the method most prominently displayed and in the foreground area of the image is the man relying on his own legs, as that would clearly be the ideal method of mobility (though the children have a pretty good deal).