A friendly nod or a wave of acknowledgement in response to an act of courtesy helps to create an atmosphere of goodwill and tolerance so necessary in modern traffic conditions.

对礼貌行为的友好点头或挥手感谢有助于创造带有善意的宽容氛围，这在现代交通条件下是非常必要的。

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It is an indispensable product in modern traffic equipment.

是现代交通设施中不可缺少的产品。

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Modern traffic-responsive Urban Control (TUC) additionally takes public transport into account.

现代交通感应城市控制(TUC)系统又将公共交通纳入其中。

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As modern traffic built up that led to queues along the Cob as motorists waited to pay.

BBC: Porthmadog marks the 200th anniversary of its 'Cob'

With airlines cleaving away from the hub-and-spoke system -- which once rigidly controlled arrival and departure times -- in favor of more or less continuous schedules and red-eye flights, the hotel industry needs to restructure its own arrival and departure policies to reflect modern traffic flow.

CNN: 10 ways to improve the travel industry right now

And some nations, notably Brazil and Senegal, which were handling Air France Flight 447, don't yet have modern oceanic air-traffic-control systems.

WSJ: How New Air-Traffic Control Systems Operate Over Oceans