Never too old to learn

[Gwizz]

In testing my new map I learned something I didn't know.  To be different I set my AI trains to wait for a full load. Yet I also had given the trains no cargo to pickup and load, no consist to return to the AI supply station. 

I normally always set the AI trains to not wait for cargo at a drop station and I don' t pick any cargo for them to pick up and return.  That way the locomotive always returned empty for more cargo from the supply station.

But by asking an AI train to wait for cargo, and by leaving its consist empty,  It will pick up available cargo and load itself with the most valuable cargo loaded first.   

This may also work at the AI supply station when I want the loco to haul all available cargo without me micro managing the AI trains. 

Now I understand why some people had a hard time controlling the AI when they were off running their own RR.