Sounds like the BRO (Border Roads Organisation) signs you can see in the Indian Himalayas. These are some of the scariest (and most dangerous) roads in the world, so it's a special sort of relief whenever you come across their subtle life-saving jokes:
(My assumption being that English is a 2nd language for you...) If you're referring to the "Mr. Late" and "late Mr.", it's a play on words. "Mr." being a male title in English, and the dead are sometimes referred to as "the late Mr. Smith" (why is a lifelong mystery to me). So it's better to be the guy that's late ("Mr. Late") rather than speed down a dangerous road and be dead ("the late Mr. Smith").
The humorous "be careful or you could die" poems are also a feature of some bike events I've done, like the Marin Century. They particularly urge people not to descend mountainous curves faster than they can keep control. Which I guess is exactly what BRO is doing with its signs.
https://www.google.com/search?tbm=isch&q=bro+signs