Clear a Safe Path...
	Ghost Trains...
	Reverse-Engineering...

Using precise timing with the tap controls it is possible to keep a train indefinitely at the lights. Doing this gives you time to clear a safe path.

To avoid a crash it is crucial that you keep the speeding Ghost Trains in the Far West Era away from the real locomotives.

Start a level and watch the disaster unfold so you can then reverse-engineer the puzzle before starting the level again.