Control conditions refer primarily to interrupted flow facilities, where such controls as STOP and YIELD signs and traffic signals have a significant impact on capacity.

控制条件主要指断流设施，在那里停车避让标志和交通信号控制等能力有重大影响。

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The mutual impact of the vehicles gradually increases with the decrease of the freedom of the vehicles operation in high-density traffic flow.

在高密度交通流状态下，车辆行驶的自由度下降，相互影响逐渐增大，主要以跟驰行驶和换车道行驶为主。

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How big an impact can they have on the evacuation traffic flow?

他们对于撤离交通的冲击会有多大？

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The bridge will remain open to two-way traffic flow and there will be no impact on pedestrians or cyclists.

BBC: Weight limits placed on 'deteriorating' Derby bridge