Road Works signage needs to display a clear message quickly with a clear image and/or a few simple words. That one sounds like a distraction for drivers with too long a script!
There was one that use to be put on the Rear End of the HGV Trailers Mickey, these were put on for the clowns that drove right up your rear end, " Smile as you go under" It was never taken heed of & many got killed.
First seen by me on the M20 on the way to Dover, I wondered how many UK residents (let alone foreign visitors) would grasp its meaning before it hit ...