[DoughtyOne]

If our grandparent’s generation had the insight of these idiots, we’d still be using horse and buggy.

“Hi Bill. I see you want to leave your property. That’ll be $25.00.”

[Publius]

Washington, PA, according to my road atlas.

[Stosh]

For the curious, if you’ve never encountered one, there’s a whole website on these things: http://divergingdiamond.com.

Wikipedia has some pretty good illustrations as well.

[IronJack]

There's one of these in Minneapolis by the airport. It is the most ridiculous thing imaginable. For about a block, you switch over from driving on the right side of the road to the left. I don't see how it saves any time, and it's dangerous as all hell, since you have arbitrarily forced two traffic flows to cross each other in the span of a couple of blocks.

But what do I know? I just have to drive on these streets; I'm not smart enough to design them.

[rockrr]

I wonder haw many additional miles I’d be willing to travel to avoid one of those things? So far it’s just a rhetoric question.

[Oshkalaboomboom]

We had one of these interchanges installed near where I lived in Georgia. For years traffic in that intersection was a nightmare. After they put in the DD you could zip through in no time flat. It’s a stupid sounding idea that works brilliantly.

[HereInTheHeartland]

A new one close to me in Waukee IA.
It caused a guy to get confused (yes he had been drinking) and get on I 80 the wrong way. He hit a police car head on and killed two cops and a prisoner they were transporting at 2:00 am.

[reg45]

We have one of those at IL-59 and I-88. It’s the most confusing intersection I have ever encountered and my wife agrees.

[IndispensableDestiny]

Interstate 95 where is crosses the Baltimore Beltway north of the city had flip flopping lanes (northbound crosses over southbound and back). No body called it a diverging diamond.

It's gone now, replaced with multiple elevated ramps.

[Tolerance Sucks Rocks]

The first DD interchange that I drove through was at I-84 and US 91 in Chubbuck, Idaho in July 2014. It surprised the heck out of me because I had no idea that the interchange had been rebuilt that way.

[fruser1]

Can’t beat a full clover leaf.

I think roundabouts are great but for some reason some folks can’t stand them. I’ve never seen a backup at a roundabout.

[vladimir998]

Video explanation for a DDI in Idaho

https://wn.com/chubbuck_diverging_diamond_interchange_video

[SKI NOW]

"Gov. Andrew Cuomo has suggested using congestion pricing to reduce traffic flow through New York City"

Interesting, while others are looking to design for solutions Cuomo's first thought was to fleece the public.

[Vision Thing]

This is an efficient design. It simplifies the process of the ‘problematic’ left turn, especially for those who want to make a left turn onto the street after exiting the highway: these people will be able make a left turn without even stopping.

Also, anyone who ends up stopped at a redlight while waiting to enter the intersection only stops once. When the light turns green, everyone will make it through the intersection without suffering another red light.

[jacknhoo]

I know of two diverging diamond interchanges here in GA, I use them almost daily. Tremendous improvement.

[Some Fat Guy in L.A.]

Supposedly getting one of these near me. It makes sense when you watch the videos, but the crossover sections give me the willies - reminds me of the old figure-8 racing that always turned into demolition derby.

[lewislynn]

•The DDI design eliminates left turns across oncoming traffic, improving vehicle flow and decreasing the chance of accidents.

AKA a freeway...been around since at least the fifties.

[P.O.E.]

Diverging Diamond Interchange Visualization