Originally Posted by speedog
A cloverleaf may not be as wasteful in land area as compared to other types of interchanges but when one starts comparing the efficiencies and safety of various types of interchanges, the cloverleaf will always fall to the bottom of the list. Calgary has one cloverleaf left as best as I can recall and in comparison to any other type of truly free flowing interchange, it is truly just a PITA..
Are you talking about 16th and Barlow? I believe that was the first cloverleaf in Calgary - back when Barlow was Edmonton Trail (and actually went to Edmonton). It also has the distinction of being the only cloverleaf I've seen that actually looks like a clover.
There's at least one other cloverleaf I can think of, albeit with oddly-shaped lobes, and not a highway-highway interchange either. University and 16th. Of course there's also many three-lobe clovers (Deerfoot and Glenmore surely would have been four-lobed if they had space).
Crowchild and Stoney is a little weird. Its a modified cloverleaf, such that weave lanes are only on one of the two highways and also such that the weave lanes are longer. However, its also weird in that its a very new interchange; most interchanges on Stoney were parclos, and cloverstacks if volume warranted (both Stoney-Deerfoot interchanges, as well as Stoney-TCH).