Speed warnings

The photo below was taken in Ontario, but New York State and Pennsylvania also had these type of signs (In Miles per Hour)

So they looked more like this

I used to find these extremely useful when traveling, 

 Let's see... it's 131 miles between Scranton and Lancaster... I Have $240.00.... so...I can afford to do 80 mph and get  pulled over once...or I can take two 75 mph tickets and get change back.