68803 ⎘
Safety means for rail/road crossing traffic; Means for warning road traffic that a gate is closed or closing, or that rail traffic is approaching, e.g. for visible or audible warning electrically operated Wiring diagram of the signal control circuits
GRADE CROSSING GATE ARM POSITION DETECTION SYSTEM
#2Warning light control system with variable flashing rate
#3Double-sided terminal board for grade crossing gate controller
#4Grade crossing gate arm position detection system
#5User interface for grade crossing gate controller
#6Systems and methods for controlling railroad highway crossing flashers
#7Grade crossing gate arm position detection system
#8Double-sided terminal board for grade crossing gate controller
#9User interface for grade crossing gate controller
#10Railroad crossing gate monitoring and alarm system
#11System and method for controlling a wayside device