Decouple Rule?

Hi guys - has anyone written a rule for decoupling any car that passes over a trigger? Is it possible? I know there are the couple masking rules - but i just want any coupler that passes a trigger in reverse, to open.

Any ideas?

Hello Packetloss, I dunno about a command but if you uncouple a wagon before it stops it will keep rolling until it derails. There is some commands that can do this (uncouple at track mark)(decouple/from name of wagon)(uncouplefrom#)I use this one a lot but i use the stop command first to bring the train to a full stop before it uncouples. If you need kuid numbers let me know will look them up and post back.
Danny5