Order: priority vehicle - priority road - same level (right road is empty - right - go straight - left):
1. Police car because it is a priority vehicle<9 >2. Cars because they are on the priority road and the right side of the road is empty (by police cars)
3. Trucks because they are on the priority roads and on the right side of the road, the trucks get in trouble with passenger cars< 9>4. Passenger car because it is not on priority road