Now that we've mastered roundabouts, the powers that be are presenting us with the Diverging Diamond Interchange:
That takes up a lot of real estate.
You've got to be kidding me. What happens when someone who's never driven one before does so for the first time? It looks like nothing more than a accident waiting to happen.
Looks pretty wild. Whenever I see something crazy like this it is just a reminder that there is still LSD out there!
Unfortunately, where there is extremely busy traffic there is usually very little real estate.
When I first looked at the arial view, I thought that it was a crazy idea.
After studying the layout for awhile - it makes sense for a number of reasons:
1. No big "Loops" that eat up landscape and use a lot of concrete.
2. No "Left turn arrows" at the traffic lights - this allows higher traffic volumes.
3. No accell/decel lanes under or over a bridge that are dangerous due to the traffic merging off in the same distance traffic is using to merge on.
Granted, when you've got plenty of acreage to build a very large Clover Leaf (and the money for the cost of the land and concrete), a Clover Leaf is a great design with no traffic lights required.
I thought that it would be confusing to a driver, but you can't see the concept from the ground and it's just like cross-streets from the road.
In an urban environment, where land is expensive and obtaining the "Right of Way" may generate legal battles - it's a good solution.
When I lived in Miami FL, there were no clover leafs, except where there were 2 limited access highways crossing. All the interchanges at city streets were straight on and off ramps and it was extremely easy to merge on or off I-95.
I think the Diverging Diamond interchange is a good idea, but not for all interchanges, although there is a way to elimanate the traffic lights if you want to.
I like the concept. We have a few in Utah and they are alittle strange the firs time or two but work quite well.
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