Level Crossing Design - AHBC

Technical terms and relay names explained in "plain English"

• Full operation sequence for each crossing type
• Function, appearance and diagrammatic representation of common level crossing components
• Barriers, pedestals, controlling and proving circuits
• Road Lights, flasher units and lamp proving
• Audible Warning units and controllers
• Treadles - Normal and Reverse contacts
• Local Control Unit
• Automatic Half Barrier Crossing
• Operational requirements and control tables
• Understanding of Circuitry
• Function of all relays and circuits
• Operation sequence
• Single track and double track bidirectional
• Signals within strike-in zone
• Stopping/ Non stopping controls
• Indications and alarms
• Control table and typical circuits for these level crossings