software

[memethree]

Is there a computer program that let you run the trains before you run the the trains
  Thanks for any asstance Skip

[Nathan]

There are three model railroad control software web sites you may want to start with:

http://jmri.sourceforge.net/
http://trainpriority.com/
http://freiwald.com/

You also may want to look at some computer model railroad design software with running simulation in it like:

http://sandiasoftware.com/