Hump or Bump?

Nancy Newcomer BLOG: Speed Hump or Bump?

Please tell me the difference!

February 16, 2017

After moving back up to the bay area 18 months ago, I've noticed something a little different....Speed Humps.  Down south, there were Speed Bumps. I can't say I've ever seen a hump (ahem!in southern California. Aside from obvious sexual innuendo and the Tower of Power references:
Ooh, the people be bumpin'  at Bump City, The joint be jumpin' at Bump City, The mamas be humpin' at Bump City ... Tower of Power clearly suggests that the bay area is Bump why all the humps?  I'm about to get a headache, so can we please get to the bottom of this?

PS Doesn't this sign remind you of a cool radio station? ;) NN