To avoid collisions (which instantly fail the level), you must create a figure-eight pattern. Have the red train take the upper loop while the blue train takes the lower loop. At the center crossing, use a railroad switch (press and hold on an intersection to change its default direction). Set the switch to alternate every 15 seconds.
does not use a single universal password. The "password" is a unique license code generated specifically for a user after they register the game Bundled Access
: This code is required to unlock the full version, which includes additional trains, wagons, and building objects from various Extension Packs .