text: Re-opened this simply to note that to me those seemed like bumps. OTOH, given the wiki definitions for bump and hump, about 30 cm and 2-4 meters in length (to the direction of travel), respectively, there's a gray area of 1.7 meters between the two. Per OSM Wiki tag definition, that is. (http://wiki.openstreetmap.org/wiki/Key:traffic_calming)
  
  The above said, I think it's practically the same which ever is used here. IMO bump and hump are almost the same even if we'd compare, say, a bump of 30 cm and a hump of 2 meters. Meaningful difference is e.g. between a bump/hump and a =table . Or a hump 20 cm high vs. a bump 10 cm high. And the profile of the two can make a big difference too.
  
  Soooo: IMO both really are just fine. I see the typical bump/humps in DC area as bumps. I can understand that others see them as humps.
  
  Happy mapping!