mini-roundabout
noun/ˌmɪni ˈraʊndəbaʊt/
/ˌmɪni ˈraʊndəbaʊt/
(British English)- a white circle painted on a road at a place where two or more roads meet, that all traffic must go around in the same direction
迷你环岛，微型环交，微型环岛交叉口（道路交会处的环形白圈）