Where is parking prohibited?

Parking is not allowed at the edge of the roadway if it blocks access to marked parking spaces, because you would prevent others from using those spaces as intended. On priority roads outside built-up areas, parking is generally prohibited to maintain clear passage and traffic flow and to reduce accident risks. However, within built-up areas, parking on priority roads is usually allowed unless a specific sign or regulation indicates otherwise. That's why answers 1 (at the edge of the roadway if it blocks access) and 2 (on priority roads outside built-up areas) are correct. These rules help keep traffic smooth and safe for all road users.