You don’t need electricity with this simple but effective design. The weight of the car pushes the gate open. A cattle grid prevents animals from trying to escape the same way.
-via Laughing Squid
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Cattle are stupid. They don't even need a real cattle grid to keep them from crossing:
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I have no experience with cattle, but I suspect it may deter some of them from even trying to escape.
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You're welcome.
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Prevents larger-footed animals like elephants from entering.
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Isn't that what the cattle grid already does? So what's the point of the gate?
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