Seriously about the debris, I think the plan with this would be to locate the boundary barriers far enough from the facility being protected that the debris is a moot point. I would expect fixed barriers most of the way around that facility and this movable barrier would be activated most the time; except, when deliveries needed to enter. Ideally, there would be a dual lock with a buffer in between; so that, both barriiers would never need to be down at the same time.
More than debris, I would be more concerned about flammable/explosive liquids, such as a semi-trailer gasoline tanker and a burning torch on the back; hence, more reason for the buffer distance requirements.With adequate buffer distance, strategically located storm drains to a holding reservoir could at least direct the flames of the gasoline truck scenerio to a mostly managed location.
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