虚幻拥堵往往发生在大量汽车涌上道路的时候。

Phantom jams are born of a lot of cars using the road.

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警察正在指挥拥堵的车辆，使道路畅通。

The policeman is directing the held-up traffic to make access possible.

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警察正在指挥拥堵的车辆，使道路畅通。

The policeman is directing the held-up traffic to make access possible.

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