Speed Limit Device....cheaper than speed cameras

I don't know about you, but I know this would slow me down !
I see myself slowing down, trying to 'straddle' the hole , then
breathing again when I cleared it without hitting it ! This is
actually a speed control device . Scroll down and look at all
three pictures. And much cheaper than speed cameras

This is a very clever job.(piss***)

Note: I help my friend to forward this.