Speed bumps, speed humps, other

[Digit]

What does your region call raised areas created out of asphalt to reduce speed.
My adopted region of the country calls them speed humps....and I wonder how they manage to keep their signs which just declare:
HUMPS

[Kire]

1. both

depends on the size of them

humps are bigger and wider

[DrWeird]

2. hump is an awfully funny word.

What's the deal?

[sadinred]

3. Definitely Speed Bump. I have another question:

Is it Bunker Down or Hunker Down? What do you say Digit?

[RC]

4. Traffic calming devices

Brought to by the same repuke mind set that brings us the sanitized language of war.