cloverleaf /ˈkləʊvəˌliːf/

• 1. 

  N-COUNT A cloverleaf is an arrangement of curved roads, resembling a four-leaf clover, that joins two main roads. (道路的)四叶式立体交叉 [美国英语]

  例：

  The 405-167 motorway interchange is a classic cloverleaf, built in the 1960s.

  建于60年代的405-167高速公路交流道是一条经典的四叶式立体交叉道。