Several cities have installed dynamic toll systems whose charges vary according to traffic flow.

几个城市安装了动态收费系统，按交通流量收费不同。

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The paper put forward a modified model to calculate od matrix in crossing according to traffic volume in crossing.

本文提出了一种根据交叉口出行量来估算交叉口od矩阵的极大熵修正模型。

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These signs change according to traffic conditions to give drivers current information on delays and lane closures ahead.

此标志牌会为司机提供前方实时路况信息，信息包括前方道路拥堵及车道封闭等情况。

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Google accounted for 64.1% of U.S. search traffic in March, according to traffic tracker Hitwise.

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That's according to traffic data firm Inrix, which measures speeds using GPS data from commercial vehicles.

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Since 1989, at least 69 tonnes have been seized, according to Traffic, a body that monitors illegal wildlife trade.

ECONOMIST: Tusks and horns and conservationists | The