Even after having taken this picture, I was searching for the fourth leaf; it took me a while to accept there are only three of them. Even as the effect of this bit of news was being absobed, came another bolt from the blue. Apparently, only 4-leaf grade separators can truly be called "clover-leaf intersections". Anything less, and we need to talk about "jughandle intersections" or "par-clo" (for partial cloverleaf).
Anything more, it would be a spaghetti junction, apparently!