Mods/TrainCarts/Signs/Mutex

Introduction
The mutex sign handles mutual exclusion: it blocks trains from entering while another train is already inside the zone. Once the zone is freed up again, the waiting trains are allowed to continue movement. This sign is useful in combination with switcher signs to avoid crashing trains.

Syntax

 * First line: [train]. The sign does not have to be powered.
 * Second line: mutex, which without further arguments will create a cuboid zone around the sign of 1x2x1 (x/y/z). When followed by one number, the number sets all cuboid x/y/z-radius values at once. When followed by a second number, the first number sets the x/z-radius and the second number the y-radius. With 3 parameters, each x/y/z radius can be specified.
 * Third and fourth lines: Unused