怎样模拟阻塞现象？

EPFL_GO111

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如题，我想做的结果第二个红色圆圈所示，一堆人形成一个阻塞，他们的位置很随意，我就想表示这样的效果，因为extendsim的QUEUE block是让那些人一个跌一个，好像不太真实，所以我想更好看一些，请提示，谢谢！
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How to simulate a queue like a jam?
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, ~; }) H" z' ?' f$ GAs can be seen from the picture, I want to simulate a queue like a jam which is idealized as in the lower red circle instead of the upper red circle which shows a queue like one overlap one? Can extendsim can provide this animation? Or how can I do to simulate this phenomenon?