车流密度(traffic density)又称交通流密度。在单位长度(通常为1km)路段上，一个车道或一个方向上某一瞬时的车辆数。用以表示在一条道路上车辆的密集程度。
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.
通信范围的增大、车流密度的增大和具有通信能力车辆比例的提高都会增加信息传递的成功概率。
Communication range increases, the traffic density increases and improved the proportion of vehicles with communication capabilities will increase the success rate of information transmission.
随着汽车的保有量迅速增加，车流密度也在不断提高，汽车在运行时经常处于加速超车、减速制动等变速运行工况。
With the increase in the Numbers of vehicles, the density of traffic flow is also increased which results that vehicles move with non-uniform velocity on road such as accelerating and braking.
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