Though it is true you don't need to be able to read to operate a vehicle, you /do/ need to be able to read to operate a vehicle safely.
And for those who can read: could you teach someone how to drive using an LLM? Sure. Safely? Probably not.
[0] https://www.transport.nsw.gov.au/operations/roads-and-waterw...
Especially important in places like Europe, where it's common for the driver to be able to read, but unable to speak the language of the country they are currently driving through. I can't speak any Polish, but can travel on Polish roads just fine
1: https://en.wikipedia.org/wiki/Prohibitory_traffic_sign#No_en...
Then there is Hanoi.
Not really. You just need to be able to decipher the sign, which is trivial, even if you can't read it or spell it.
But in situations that could be ambiguous, I think this is a regional difference - the US, Australia, part of the rest of the Americas use lots of text on road signs (including literal "wrong way" signs); Europe and much of the rest of the world use far less text (including purely pictographic "wrong way" signs). Especially important in Europe where drivers just can't learn 20+ languages.
These signs, you mean? https://en.wikipedia.org/wiki/Prohibitory_traffic_sign#No_U-...
It's also trivial to do a u turn even when you can read, know what the sign says, and you feel like doing one because no car is coming anyway, and millions of people do that everyday too.
And whole lot of people have done stupid shit like that while perfectly able to read, many even with masters and PhDs.