We have one of those “double diamond” / crossover interchanges on a very busy major Interstate / US Hwy. intersection about 20 miles from here. It seems to work pretty well, once those of the rural locals who don’t drive a lot in bigger cities got used to it.
A few of the new design intersections on the same US Highway out toward us I’m not so sure of. They are confusing, the signage is even more confusing (unless you are an Austin, TX experience level driver), and they just seem to trade one problem (see my post above for a personal example) for a couple others. IMO, rather than the major rebuilds of the intersections, the State just should have put in a traffic controlled stop light at the most busy intersection, and better signage w/ flashing lights or maybe traffic controlled active signage / red lights for the side roads at the others.
I don’t mean the D.D. design is applicable to the scene of this accident, just interesting to me.
There is one near Stafford VS and I hate the thing, still haven’t fully figured out where to be looking for the crazy driver who blows the stop sign.
These Diverging Diamond intersections are BRILLIANT. I read an article how they take 39 potential accident scenarios to like 14 or something. I don’t recall exactly.
But we had an intersection off the interstate to the mall, and people would be LINED UP for over a mile trying to exit there, sitting on the interstate. The DD intersection fixed that so well, it’s rare to see 1/3 of the exit ramp with cars. Super smooth, great traffic flow.
Huge fan here.