focus and exposure and curves are there ok but then your pic just dies - it's a record shot of a road sign! you've got to do more if you want to compete and beat the 'big boys'
With the sign being the subject, I think you could have framed a bit tighter around it. There's a bit too much background (somewhere between 1/3 and 1/2 of the shot...)
One of the first things that came to my mind for this challenge was "curvy road signs", so you don't get so many points for creativity. As for execution, I would have probably framed it to put the blank space above or below the sign, to match with either the beginning or the end of the road the sign refers to.
Is that bird poop on the sign? :) This particular photograph appears to be a little grainy in the background... Maybe try capturing some of the curvy road with the sigh on your next attempt....