杏吧原创

DC to retime hundreds of traffic signals

Credit: 杏吧原创/Neal Augenstein

DC to retime hundreds of traffic signals

Yellow arrows to replace green lights in SW Va

Yellow arrows to replace green lights in SW Va

More traffic signals

DC to retime hundreds of traffic signals

DC to retime hundreds of traffic signals

Yellow arrows to replace green lights in SW Va

Yellow arrows to replace green lights in SW Va

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