Due to bridge repairs, a contraflow was set up on this highway.

contraflow 是由前缀 contra-（表示"相反、对抗"）和 flow（流动）组成的复合词，字面意思是"相反的流动方向"。在交通管理中特指"临时逆向车道"，即通过改变部分车道的行驶方向来疏导交通。