Yes, I'd say that was a pretty safe bet.
Like the Burma Shave placards (methinks proven to be uneconomic for advertising the product), we now have series of "informative" brief messages along the roads; telling us things like "Beware of Aggressive Drivers", or "Don't tailgate", or "Turn on Headlights for Safety", or some other nostrum that passes as a brief (gag) amusement for the bored driver or passenger.
I wonder how much those signs cost, or who's brother-in-law pushed the funding bill through the legislature, or whatever bureaucratic cesspool of corruption having the authority to dispense with taxpayer's money for such a waste of words.