It would be very easy to have switches installed that would allow only one gate to be opened at any given time. If someone pulls up to the visitor gate, the gate keeper could push his button but the gate would not open until the resident gate closes or visa versa. This business of both gates open at the same time is a recipe for disaster. Not only do you have to watch for golf carts crossing, you also need to watch for another car trying to beat you to the very short merge.
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