Most do not. Surprisingly moving a 2000 kg machine at 60 km/h you would think most people would want to know as much as possible about the terrain they are entering.
Many drivers licensed for ten years entering Canada from other countries tell me they read maybe 10% of the signs. Wow!
If you want a big step up on driving, develop the habit of reading 100% of sign, 100% of the time!
Today when you walk bike or drive start by reading every single sign you see.
are you 10% 100%?
Come on! it is a skill!