1. When any two vehicles are simultaneously approaching a road intersection by roads of which one does not enjoy priority over the other, the vehicle approaching from the left in countries where the direction of traffic is on the right» and from the right in countries where the direction of traffic is on the left, shall yield the right of way to the other vehicle.
2. The right of priority shall not necessarily apply in the case of tramcars and trains on roads.


 Convention of Road Traffic signed at Geneva September, 19 1949 (English)