I visited South Korea and drove while I was there, they had loads of fake speed bumps where they were just painted on but had no actual bump. Definitely made you slow down if you didn't know the area.
They also had lots of poles with flashing blue and red lights, so you thought there were cops ahead until you got close enough to realise it was just a pole.
The place is playing full-on psychic warfare on the roads.
Same down here in New England. We have a bunch of granite boulders waiting to move and drop a big cavity too.
Digging fence post holes here is ridiculous. You get maybe 1 in 20 that doesn’t have a 20-80lb rock partly in the way. It’s why we hav so many miles of rock walls in the woods from 200+ years ago.
This is dumb as shit because canadian winters are much more harsh than UK. Asphalt degrades faster in harsher winters. Doubt they're hitting -50C in the middle of January
Or design roads that feel like you should be going slower. Trees, narrower lanes, more walking/biking infrastructure all help people naturally slow down. Big open stretches like pictured with the stickers don't feel like there is a reason to be going slow so people don't