Wiktionary
cloverleaf interchange
n. (context US Canada English) A junction of two highways, one crossing over the other, having a series of exit and entrance ramps, arranged in the form of a four-leaf clover, such that traffic may proceed from either highway in all directions.
Usage examples of "cloverleaf interchange".
It was a short one, up a divided highway, over a cloverleaf interchange built under the reign of the Shah, then west to Hasanabad.