signpost

/ˈsaɪnˌpoʊst/

a post bearing a sign that gives directions or shows the way

中文释义：路标；指示牌

The signpost at the junction clearly indicated the direction to the airport.

交叉路口的路标清楚地指示了前往机场的方向。

Tourists often rely on signposts to navigate unfamiliar cities.

游客常常依靠路标在陌生的城市中导航。