cloverleaf
noun [ C ] US uk/ˈkləʊ.vəˌliːf/ us/ˈkloʊ.vɚˌliːf/ cloverleafs or cloverleaves /ˈkləʊ.vəˌliːvz/ /ˈkləʊ.vɚˌliːvz/
（道路的）四叶式立体交叉，苜蓿叶式立体交叉
a connection between two roads consisting of four smaller, curved roads that allows vehicles to move from one road to the other without crossing the flow of traffic