The presence or absence of freight traffic, the volume of freight traffic, and the nature of freight operations (e.g., overhead vs. local switching).

货车流量存在与否、货车流量的大小、货车运行的性质（如，高架道口或平交道口）。

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Aiming at solving the demanding problem of road traffic system in exactly forecasting the traffic freight volume, an introduction is made into the Grey Model GM (1, 1) for forecasting.

针对公路交通系统在准确预测交通运量时的棘手问题，引进灰色预测GM(1,1)模型进行预测。

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The larger the traffic volume on the specific circuit is, the higher the density of passenger traffic, freight transportation, the lower the average transportation cost is.

特定线路上的运输量越大，客运密度、货运密度越高，平均运输成本就越低。

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