Paul,
A car can only be assigned to one train.? When you move or terminate a train, you are telling the program the car dropped off is now available for the another train.? In your example, you have two trains moving in opposite directions.? If you build both trains, the cars assigned to each train are captured by that train. Since both trains are built, the cars can't be shared or swapped between them.
Now let's say you only build one train, that train captures a bunch of cars, and is scheduled to deliver those cars along the train's route.? If you move the train along the route, the cars that are spotted are now available for the train going in the opposite direction, or any other train.? So let's say the first train is half way through its route,? you move that train to the 5th location, 5 locations now have cars that were set out by the train.? If you now build the train going in the opposite direction, the cars that were set out are available to be pulled into that train.
So taking your example to an extreme, if you built 12 trains at once, not one of those trains would share a car.? But if you built and then terminated each train, the 12 trains could share many of the same cars.
You might want to try the demo files and play with them to see how cars move.
Dan
