Features: * Stop highway traffic safely along your railroad with these working wigwag crossing signals. Designed for one or two evenings of easy construction, the signals are powered by an under table drive system. Rayon thread is used to make the signals swing almost invisibly at a prototypical speed, and when shut off, the signals stop straight down, just like the prototypes. * Model #5410 is a complete kit with crossing detector and activation switches. The detector operates with trains traveling in either direction at any speed, using the small momentary activation switches that are imbedded in the track. The timing of the signal shutoff after the train passes is adjus
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