Dual leaf gates are a PITA to line up and keep lined up and harder to secure.
A sliding gate is ideal, but have horrible aesthetics for most people and a large amount of space to the side of the opening is required for them to work correctly. If it is heavy you are going to want a quality opener or you're going to have issues. A high quality swing operator is required for anything heavier duty than a metal farm gate. They just don't have the power to close a heavy gate or move it with any kind of wind.
You can get anything from a Mighty Mule and razor wire, all the way up to thermal cameras and crash barriers depends on the abysmal depth of your pockets. We just sold 19 of
these to an airport in the area. We have installed barriers rated to stop a 65000lb truck from 50mph in less than a meter at several military bases.
I went a little lighter than that when I built our gate for the homestead (out of 1/4" wall 2" tube with 1x2 tube cross bracing on the back). Its heavy enough a 1hp opener has started to make the cubic yard of concrete its mounted to shift in the last 3 years just opening and closing it. It has a lock a ½ton truck could break but would take some damage, its more to keep the wind from tearing stuff up. I need to drag some boulders up to the road and put them on either side but nothing I have access to has the ass to move them.
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