AC and battery backup supply for a railroad crossing gate

Apparatus for controlling traffic flow along a pathway

Barricade apparatus

Computer for motion sensing device setup

Crossing gate

Crossing gate counterweight adjustment

Dual signal frequency motion monitor and broken rail detector

Energy absorbing impact barrier

Extensible railroad grade crossing gate arm

Gate monitoring system

Grade crossing assembly

Grade-crossing motorist warning system

Highway crossing control system for railroads utilizing a commun

Highway crossing system with improved ring sustain feature

Highway crossing system with motion detecting apparatus

Highway-rail grade crossing controller with out of service mode

Island presence detected

Laterally adjustable adapter bracket for a grade crossing gate a

Light assembly and flasher circuit

Model train crossing gate