调拨车道（英语：reversible lane或tidal flow），香港称潮水式行车，中国大陆地区称潮汐车道或可变车道，是指可依照车流量而变换车道行驶方向的行车模式。有调拨车道的道路，通常会有不同时间的车流变化，例如上班时间进城的车辆多，则调拨车道会调整成进城的方向；到了下班时间，出城的车辆多，则调整为出城的方向。可改善交通拥塞的情形为其最大优点；但缺点是会有用路人因不熟悉路况而误闯调拨车道而与来车相撞造成事故，让调拨车道有「自杀车道」（suicide lanes）之恶名。因此有些地方的调拨车道需有警察配合指挥交通。

A reversible lane (British English: tidal flow) is a lane in which traffic may travel in either direction, depending on certain conditions. Typically, it is meant to improve traffic flow during rush hours, by having overhead traffic lights and lighted street signs notify drivers which lanes are open or closed to driving or turning.