In this test we test the general rules of traffic flow in the round about.
-Cars entering the roundabout yeild to cars already in the roundabout.
-Cars leave at their appropriate exit.
-Cars travel in the correct direction.
-Cars avoid collisions


Execute simulatemodel.bat to simulate the model.


Test Results:
(see video and logs)

You might notice that a car entering from an entrence cell is a 9 but becomes 8. This is due to numofhopsleft = 0 and so the extNumberPort changes to 8
to indicate that the car will leave the system in the mini roundabout. This is old behaviour and has been replaced with decrementing
numofhopsleft by 1 when the car info is passed from one mini roundabout to another.