. "A cloverleaf interchange is a two-level interchange in which left turns (reverse directions in left-driving regions), are handled by ramp roads (US: ramps, UK: slip roads). To go left (in right-hand traffic), vehicles first continue as one road passes over or under the other, then exit right onto a one-way three-fourths loop ramp (270\u00B0) and merge onto the intersecting road."@en . .