The magnetic field of the electro coil interrupts the battery voltage via a special switch in the vehicle. Connection 12 - 16 V/DC, direct current. This can be used to set up bus stops, operate pedestrian pathways or traffic light controls, stop vehicles at railway crossings without light signals, simulate loading and unloading processes at the roadside or at the loading ramp, allow fire trucks to exit the fire station and return to the depot, manage single-lane construction sites, and much more.