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« on: December 07, 2010, 01:44:42 am »
You can use D-O-R to make it a restricted zone. This will cause the dwarves to see it as being twenty-five times longer than it really is when pathfinding. That will prevent dwarves from wandering onto it. That being said, if they have a task where the only route to that task crosses the bridge , they will use it. If it's the only way outside, any dwarf who needs to go outside, whether to chop a tree or pick up a XXsockXX, will do so.
If you need to keep your dwarves inside, but still need caravan access, make a burrow that covers every single area of your fort and assign all your dwarves to it. If your woodcutters need to go outside to cut wood, unassign them from the burrow. If your miners need to expand your fort, unassign them. This is probably the best way to do it, though it is time-consuming.