How does the railway crossing barricade work? What's the procedure?

- Jan 20, 2018-

It's a simple high guage wire and pulley mechanism via effective force transmission from the control hut to the pulley is through a gear assembly and in modern electronic barricades that are being installed installed inside yellow boxes which you might see along crossings nowadays , the same mechanism is simply AUTOMATED and motor driven rather than pully/gear me thorough electronic systems via use of sensors and robust micro controllers with an added facility of remote control of barricades through nearest station hut also.