Congestion pricing, an important element of TDM (Transportation Demand Management), has been key content of traffic economics.
拥挤定价作为城市交通需求管理的重要组成部分，是交通经济学的核心内容之一。
Congestion pricing, an important element of TDM (Transportation Demand Management), has been key content of traffic economics.
拥挤定价作为城市交通需求管理的重要组成部分，是交通经济学的核心内容之一。
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