text: Great. Both options are fine with me as well - I opted for humps because this seemed more sensible for me.
  I am from Europe, where bumps/humps look much more like traffic_calming=bump in the wiki, and the DC version of it much more like the humps. Plus the traffic signs say "hump". However, I don't think it makes a big difference, and if asked I would even challenge if there was a need for two different tags.
  Happy tagging!