cloverleaf

a road arrangement, resembling a four-leaf clover in form, for permitting easy traffic movement between two intersecting high-speed highways. One highway passes over the other, and both are joined by a system of curved feeder roads permitting vehicles to enter and leave the highways.

shaped like or resembling a leaf or leaves of clover.

an arrangement of connecting roads, resembling a four-leaf clover in form, that joins two intersecting main roads

(modifier) in the shape or pattern of a leaf of clover