1. When driving a commercial motor vehicle with an overall permissible weight of more than 10,000 Kg.
  2. When driving a motor vehicle that is forced to drive at a slow speed due to the cargo it is carrying or to the slope of the road.
  3. When driving a bus with an overall permissible weight of more than 10,000 Kg.
  4. Never. The law prohibits driving on the road’s edges.