Thanks, Lewiscc65. The Resource Verify Rule did the trick...once. Industry-1 reached the set minimum, train drove to pickup, loaded, proceeded to industry-2, unloaded, drove back to "parking spot". But since industry-1 kept producing it is still above minimum, Rule does not fire again (I used a Simultaneous List to display a message and fire off the Driver command). Any ideas on "resetting" the Verify? Side question, when the driver command fires, the command list disappears from the lower left of the HUD?