The design of the canterlever gate was simple. You had a cable which was anchored at the mast, then ran up to where the fold of the gate was, there was a hinge there, with a rod attached to the top portion of the gate. When the gate was lowered, the cable would hold the rod in place while the gate descended, pulling the top portion of the gate horizontal. If adjusted properly, the gate would be straight horizontally. Of course it was always fun trying to get it that way, especially with traffic being held up while you were trying to make the proper adjustments. The tip of the gate was always getting smashed, from cars and trucks going around the gates. Then there were a few times when the hinge didn't fold and the gate stayed straight, it would hit the high voltage wires overhead, it would come down the lighting cables, back through the operating cables, into the signal case and blow it up. I've seen that a few times in my career. But for the most part it was a simple design and it worked well. Hope this answers your query about canterlever gates.