柯林斯詞典contraflow /?k?ntr??fl??/ 1. N two-way traffic on one carriageway of a motorway, esp to allow maintenance work to be carried out or an accident to be cleared 雙向行駛; 公路上來回車輛暫時共用同一側路面行駛,尤指為使維修工程能順利進行或因車禍而導致的情形[英國英語] 返回 contra-flow