This is so true!
You also get the signs warning you of "FOG" when it is as clear as a bell!
Even had one advising me that L1 was closed. Never actually passed any cones, workmen, tempo mandatory speed limit sign or anything.
Advisory speeds of 40mph - which recur for about 5 miles - with NO hazard. Then you get "End" sign
Hardly a surprise that very few that take much notice of these.
"Tired- take a break" messages or the ones reminding people not to use the mobile phone etc, etc. Will agree - these are useful for the numpty brigade out there!