Originally Posted by
pogopossum
The basic problem with the cloverleaf is that the outside lanes are asking drivers to accelerate and decelerate in the same lane. There have been some modifications where it kind of works, (again, MN: 35E and 77 in Apple Valley) but it is still a stupid design (MN: 494 and 35W)
PP
And most cloverleafs aren't nearly large enough to handle large trucks turning, so the ramp speed has to be 35 mph or less.
The reason the diverging diamond should be safer is that the two crossing intersections with traffic lights are "no turns" intersections. No left turns; no right turns.
Notice the no-left-turn and no-right-turn signage at the intersections in the YouTube video. Although I think it might be a bit more elegant simply to post "NO TURNS" signs. (Probably a desire to go with the international pictographs instead of English signs.)
I suppose the ultimate diverging diamond would overpass/underpass the two intersections - but you'd need a lot more land to handle the grade separations.