通信信号设施
Communication and signal facilities
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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。
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.
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