Rokal manufactured both semaphore and color-light signals to regulate train movement. The company marketed both "Home" and "Distant" signals. Home signals were "stop & stay" type signals, while distant signals advised the engineer of a moving train as to the status of the upcoming home signal. If the distant signal was green, the engineer knew that the upcoming home signal would also be green. If the distant signal was yellow, the engineer would begin to slow the train in anticipation of stopping at the next signal.

Color Light Signals

     The more modern color light signal simply used colored bulbs showing green, red, or yellow to indicate train movement.

     Distant signal (left) and home signal (right). The distant signal would show either two green lights or two yellow lights. The home signal would display either red or green. The green light would be above the red signal on the mast.

Semaphore Signals