车流密度是研究交通流理的重要参数之一。
The traffic density is one of the most important parameters in the traffic research.
如果车辆密度大幅高于上述数字，则车流模式开始出现不稳定现象。
If the traffic density increases much above that, the flow pattern begins to become unstable.
如果车辆密度大幅高于上述数字，则车流模式开始出现不稳定现象。
If the traffic density increases much above that, the flow pattern begins to become unstable.
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