I can see where that would take some getting used to
Everything new takes some getting used to. The question is whether it is safer and more efficient. The answer is yes on both counts. I have experienced it and it works great. If driving through a DDI confuses you at all after your first time through it then my guess is you should not be driving.
We have several here in VA. It took a little getting used to, but easy to navigate.
We have many planned and one currently under construction as well as one or 2 up I 75 from me.
I have encountered themā¦ the first time was confusing, the 2nd time was OK.
Our nearest one will be completed just before the start of the tourist season. I hope there is a traffic camera accessible from the internetā¦ The car-nage will be hilarious.
Yep, they work fine. I use one that connects to I-95. At rush hour intersection will have delays, but not as bad as intersections with left turn lanes.
IMO, the cloverleaf is still better, no traffic lights required, but they do require more land.
I agree, never had an issue with a cloverleaf and they are very easy to navigate and safeā¦ I have never even heard of a DDI, but after watching a video of it, I understand it, but I am sure if I had not seen the video and I ran across one, it would be a WTF moment, as well as other drivers would beā¦
In NC I navigated one near Asheville, and they are building one outside the Raleigh-Durham airport. It is just a bit strange. I do agree the cloverleaf is better, but yes they need much more space.
I wonder when the last clover leaf was built. Bet itās been years. Those tight curls and resulting short merge lanes are a problem. Now all the new ones have long ramps in all directions.
Hereās one I pass many days:
The cloverleaf is easy to understand, for sure. My civil engineer father really liked them but as time went on, he agreed it was past its time. Why? Traffic volume.
The uphill 270 degree turn slows the traffic at the same time as they are trying to merge into full speed traffic flow which is sharing the very same lane with people slowing to enter a downhill 270 degree turn. That chaos causes tie-ups and accidents right in the middle of an overpass.
Thatās what diverging diamonds were designed to fix.
A cloverleaf has a weave area. A DDI doesnāt. I wouldnāt say the cloverleaf is better.
Looked at the wiki page, I could deal with that! https://upload.wikimedia.org/wikipedia/commons/1/10/Diverging_diamond_redone.svg
Thereās been one here for a couple years, works very well once you get used to it. Felt wierd to turn left at the off ramp directly onto the left side of the overpass. Redo of an existing overpass to improve traffic flow going to and from I-5,
Or, you dont want to merge nicely? You WILL stop and merge now.
Highway dept will control how you drive.
There is NO merging now.
Most all of our merge on and off ramps are plenty long, with plenty of merge roomā¦
Around the Greenwich area of I95 in CT you are lucky if you get 10 Feet of merge area. Iām glad my car has more than adequate acceleration. 
Same here. But too bad so many people donāt know how to use them. There are some short ones in my area, but most are plenty long. The ones I use most frequently (on/off side of same entry/exit) are nice and long. Ideal, really. Yet I frequently find myself behind āthat personā who thinks you ācautiouslyā (!?) go down the entry ramp at like 40-45 only to speed up once entering 70mph traffic!? WTH are you thinking?
Then the are the (probably same) ones who think they need to slow down BEFORE hitting the ramp. WTH? I donāt get it. It defies even common sense.
As for the diverging diamonds, I have two near me. One has been a god-send in terms of smooth/much faster traffic flow at a busy rural main highway / interstate interchange. The other is also fine, but the lights arenāt synced correctly so it doesnāt work as well as it could. Iāve reported that to DOT, but the DOT people around me are apparently dense.
Yep, still get behind people that want to merge into 75MPH traffic at 35MPH, no matter how long the merge lane is.
