"You might employ simulation software like that offered by Trainz (www.ts2010.com) to "construct" and then test LDE's (Layout Design Element) revised trackwork to see whether you have inadvertently short-circuted a logical switching pattern.
In MRP (Model Railroad Planning) 2007, Jim Richards explained how he found a missing but very important crossover by test-running a train over his then-virtual railroad."
Hmmmm..... I wonder how many other big name model railroaders use Trainz as a building tool?
