The postbox in original Create is convenient to send packages between stations. However, it is difficult to avoid the packages being put on the train which won’t go to the station of the packages’ destination.

For example, suppose there is a railway line with 3 stations: A, B, C. A package is in station A and its destination is station C. A train is from A to B. When the train starts in A, the package will be put on the train. However, the train won’t go to C. So the package won’t get to its destination and will be on the train forever.

Solution: Create a new postbox “Advanced Postbox” which will only put the package on the train only if the destination station of the package is in the train’s schedule.

Still in this example, the new postbox will put the package only if the train will go to C, instead of just put it on any train.