It seems that this will still suffer the weaving problem that plagues cloverleaf intersections - note how on the bridge cars first enter the road (from the freeway) and then shortly afterward, leave.
Perhaps this could be mitigated by placing stoplights on the offramps (which can be conveniently anti-synchronized with the lights controlling the bridge entrance), but I imagine space on the offramp could be a huge issue.
The main idea is that it's a much cheaper upgrade to the diverging diamond from a standard diamond interchange with left hand turn lights, but it's still a fairly substantial upgrade for traffic flow. The cloverleaf eliminates all the lights, but requires a lot more construction and takes up way more land.
It is pretty close to a cloverleaf interchange (http://en.wikipedia.org/wiki/Cloverleaf_interchange), but with the addition of stoplights on the road.
It seems that this will still suffer the weaving problem that plagues cloverleaf intersections - note how on the bridge cars first enter the road (from the freeway) and then shortly afterward, leave.
Perhaps this could be mitigated by placing stoplights on the offramps (which can be conveniently anti-synchronized with the lights controlling the bridge entrance), but I imagine space on the offramp could be a huge issue.