05-13-2011, 09:57 AM
Remember that for operations, you don't want the spots full. If you get too many cars on the layout, you choke it to the point that almost nothing moves! Often times an industry will have space for 5 cars on a spur when they never use more than 3. If every spot is filled and you have more cars to deliver, you need to be able to remove some of the cars already in place before you can spot the new ones, and you may need to drop some temporarily in the process to get them out of your way.