(道路)在双向的道路口有一条单行道的；当车辆相遇时一方必须离开道路让另一方通过的。
(of roads) having a single lane for traffic in both directions; when vehicles meet one must pull off the road to let the other pass.
请注意，如果并非所有的道路都是单行道，那么我们可以在图中为每一条双行道画两条有向边，每条边指明一个方向。
Note that if not all of the streets are one-way, then we can obtain a digraph by drawing for each two-way road two directed edges, one in each direction.
对高架道路、单行道及大道模型进行了修正，增加了由直线到斜线高架单行和大道的曲线连接组件。
Elevated Road, One-Way Road and Avenue viaduct models have been revamped, with new orthogonal-to-diagonal curves added to One-Way Road and Avenue viaduct sets.
（道路）在双向的道路口有一条单行道的；当车辆相遇时一方必须离开道路让另一方通过的。
Pedestrians and vehicles must, when passing a railway level crossing or a pedestrian cross-walk, observe the relevant regulations governing passage over crossings.
（道路）在双向的道路口有一条单行道的；当车辆相遇时一方必须离开道路让另一方通过的。
Pedestrians and vehicles must, when passing a railway level crossing or a pedestrian cross-walk, observe the relevant regulations governing passage over crossings.
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