the size is also a limiting factor for the cloverleaf; a 270 degree turn at reasonable speeds requires a lot of land cause the curve radius is so huge and you'r

the size is also a limiting factor for the cloverleaf; a 270 degree turn at reasonable speeds requires a lot of land cause the curve radius is so huge and you're going three quarters of the way around. there is also the weave required between exiting off a loop and other traffic entering onto it. you could theoretically get rid of it by bridging one loop over the other but then you may as well just bridge more of it without the 270 degree turn at that point. and there are also compromise designs like the cloverstack where only two opposite sides are the 270 loops to avoid the weaving problem.