Speed bumps do slow drivers.  But, in new road construction I think the last bit of 72nd to Brayton, in twilight, I hit a poorly marked unexpected speed bump doing 30 mph.  I was launched, though not quite as dramatically as the Dukes of Hazard out running Boss Hogg.  My car landed with a hard solid whump front end bottom hitting first.  Later, my perfectly good auto trans was chunking and wouldn't go into reverse.  I found that my tranny bottom pan had been creased on the rear edge and cracked leaking my transmission fluid..  This is, a heavy duty pan.  I was relieved, because It had just become a matter of a routine tranny fluid and filter change with a new tranny bottom pan added.    Please, in new construction, put a clear temporary speed bump sign until the standard signage is installed.  Please, please.  This is not  a neighborhood with houses either.  Aren't speed bumps getting a bit out of hand?

I feel sorry for emergency crews getting launched like that.