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<p>Watermark: Fire Safety Academy logo icon, 70 px, 45 % opacity</p> <p><b>New page</b></p><div>== Summary ==<br /> A small spare capacity above continuing arrivals clears an existing queue slowly. Based on Nelson and Mowrer (2002), pp. 3-371–3-372, and ABCB (2020), p. 280.<br /> <br /> Original illustration for [[Hydraulic evacuation model]], level 3 Advanced.<br /> <br /> * Source basis: Nelson and Mowrer (2002), pp. 3-371–3-372; ABCB (2020), p. 280. Create an original visual; redraw, do not copy source figures.<br /> * Alt text: An example queue grows with limited doorway flow and drains slowly when discharge only slightly exceeds arrivals.<br /> * Accuracy notes: Label these as separate mathematical comparisons. The clearance case assumes an existing queue and continuing arrivals; it does not depict a doorway being widened during evacuation. Continuous population values are model approximations.<br /> <br /> == Licensing ==<br /> New drawing by Fire Safety Academy. © Fire Safety Academy.</div>

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