This isn't about road quality, but slippery conditions...
Two weeks ago it had been cold for some time, but suddenly it was above 0 C, and it started raining. The rain froze as it hit the ground

An Audi All-Road (a taxi) was standing still in a hill (not especially steep) outside a nightclub. Two drunk guys came sliding, and grabbed the Audi to stop. That was enough for the car to start sliding! It stopped again after one meter, but still!
I did this :shock: for a while and walked carefully home...