Alleys, garages and gates that get used daily
On a lot with an alley, the gate at the back is probably the busiest part of the fence. Trash carts roll through it, cars pull in beside it, and snow gets shoveled against it. A thin gate on light posts will sag within a couple of seasons, so this is where extra strength pays off.
Think about swing direction, too. A gate that opens into the yard stays out of the alley, while one that swings out may block a neighbor. Where space is tight, a sliding gate or a double gate with a center latch can work better. Details like these decide whether a gate stays pleasant to use.

