We\'ve had these for a long time in England (on a smaller scale)....next they\'ll invent.....a phone thats mobile!

I\'m guessing that the study did not include bicycles as a viable means of transportation. It would only take a very few of these intersections on a given route to significantly increase the distance and/or time for a bike commuter.
Of course, if it means they get there alive ...

This concept is used to a certain extent down here in Highlands County Florida, though not at major intersections. But, most secondary side-streets are right turn only, reducing the amount of lanes a driver must concern themselves with. A right turn, then a u-turn is supposed to be much safer and easier. Though initially annoyed and skeptical, I am warming to this concept.

still need to wait for a clear run to turn right.
this is just a stretched round-about (something found all over the place in New Zealand).

Apparently the writer\'s never been to Seoul, Korea, where the majority of intersections work this way...

Well, isn\'t that what roundabouts are for? Roundabouts are compact versions of the elaborate setup described in this article: if you want to cross the main street on a roundabout you enter the roundabout with a right turn, follow the roundabout until the intended exit (therefore effectively making an U-turn) and then exit the roundabout with a right turn. No left-turns, no perpendicular crossings.
This is at most a roundabout which is longer along the main street than it is along the secondary streets that cross it. And, it needs more traffic signs to be correctly understood (lane selection signs, U-turn signs...).
Even worse, the driver that tries to cross the main street has to cross all the lanes on either side of the main street in order to get into the U-turn allowed lanes and to get into the second right turn allowed lanes, which he doesn\'t need to when on a roundabout (on a roundabout the driver can/should stay on the right-side/outermost lane until his exit).
All in all roundabouts are better.

i think, a big circle is a very nice system... fast and you can leave in alot of directions. make the cars more slow before with some fence or bumper, and its a quite elegant solution....
correct me if i am wrong with what i am saying

Britain has overcome this problem already by the simple expedient of using roundabouts with a clear rule about who must give way to whom when entering a roundabout. The traffic there flows faster, with a much lower accident rate and avoids unnecessary travel in the \'wrong\' direction simply to join the appropriate traffic stream.
It\'s U-turns that are dangerous - especially when a huge truck blocks three lanes innorder to make its turn.
Sorry guys, this one won\'t fly.

Got these in Australia too...

in New Jersey they\'re called circles ( a little smaller ) The problem still remains that you have to cut across multiple lanes of traffic in order to use them. At 60 - 65 mph it\'s still VERY TREACHEROUS. Whatever happened to that 50\'s idea that we would all have a family gyroplane to replace the car by the year 2000? LOL