Overloaded trucks,Sharp turns with gradient.Atleast,the govt should double the road width to accommodate such trucks.These trucks are not manufactured originally like this. It's because of greed, we elongate them locally without any recourse to safety!In Australia trucks are never over loaded. When going down such zig zag hills truck drivers do not use any foot brake as it is saved from over heating and failing. Low gear and exhaust brakes are used to maintain speeds below 30kmph foot brakes are always saved.