Thanks for commenting. Good point about people driving by the bus stop (or walking by it, as I did). I guess it’s always a cost/benefit analysis on the part of the media buyer, and that should factor into it.

A couple of thoughts:
1. Car and truck drivers can often see bus stop ads. Not as many as can see large billboards, but perhaps–giving the media buyers or the ad agency an unreasonably high benefit of the doubt–the media buyer was able to get a very low price for this placement.
2. Who goes to auto shows? Do less affluent people–who are more likely to take the bus–go to these shows? (I’m not a cars guy and would never go to one, so I don’t know)