Ashford Dunwoody and Interstate 285 Diverging Diamond Interchange Visualization
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- เผยแพร่เมื่อ 11 ต.ค. 2011
- Computer generated visulaization of the Ashford Dunwoody and Interstate 285 Diverging Diamond Interchange. The video was provided to the City of Dunwoody courtesy of the Perimeter Community Improvement Districts (PCIDs).
Who came from the drivers manual?
Me.
Me
Me
Me
Me
I'm here from a qr code
Lol same
Me tooo 😭😭😭
Notice that the cars in the animation are all failing to stop before the pedestrian crosswalks. Clearly pedestrians aren't meant to be part of this type of interchange even though they must be accommodated.
No matter what people write, the video still clearly show traffic still waiting for other traffic.
With that much traffic someone has to wait a bit unless you build tons of bridges for every direction.
but there is more buffer zones in this design , which still results in a much higher CPS flow per lane distribution. Then there is the bonus of having only 2 signal phases which only adds to the CPS flow, Lo0o0oL
Tsk, tsk... some of these naughty simulated cars are blocking the crosswalk!
This idea comes from the French?
Fantastic.
I don't knowwher you live, but the roundabouts in Carmel, Indiana where I use to live work great.
Help, I'll be back in ATL next week after a year away. Every time I return something ELSE has changed. This offers much potential for confusion until you get the hang of it. What about all the out-of-towners and first-timers?
F dem newbies. Apparently.
Well, it sounded crazy at first, but it does seem to be working! I've not tried it at rush hour yet, but the times I've used it it seemed to work well. Now they are talking about another one at Peachtree Industrial and I-285.
The roundabouts in my area don't work because the diameter of them is far too small. You're having to try to look in two directions at once (both the roundabout and the lane coming in next to you) to try to see if it's clear. If they were bigger, they might work.
I haven't been to ATL in years, but the whole concept of "285 flow" makes me laugh. It was always insane on the North End.
Is this the follow-up to the PSA "Your brain. Your brain on drugs." ...???
This may eliminate awkward left turn signals but it requires all traffic on and entering the secondary road to stop at least once. That's a lot of stopped traffic.
As I see it, if you're going either north or south on Ash-Dun, you cross into the left lane to cross 285, then back into the right lane. Can an entire group of engineers have an acid flashback at the same time?
Springfield, Missouri already has one of these things at the intersection of I-44 and state highway 13.
BTW, the signal timing in this video seems a bit off. There's a good five seconds of time lost between light changes. Simple tweaking could fix that, however. Plus, this is just a demo video.
These interchanges should be the standard for High Traffic interchanges and Traffic Circles should be the standard for lower traffic and rural interchanges.
I used to work and go to school in this area. This could work but they will need to address all of the traffic coming from Perimeter Mall and the Perimeter Center area as well. Its a zoo in that area during rush hour.
Looks to me like the traffic exiting will back up to 285 unless they are given a lane where they can continue to move, ie the yellow cars.
I like going back and reading all the comments from idiots saying it wouldn't work. It's working great! Traffic is moving smoothly and accidents in that area are down 30 percent.
Ok, you have three lanes merging into one entering WB 285 where you will have 285 vehicles merging right into that lane to exit P'Tree Dunwoody, and have to merge left one lane for 400 or two lanes to continue on 285. Entering EB 285 From Ashford Dunwoody NB you have the outer lane merging with SB Ashford vehicles.
See a lot of wrecks happening. Every Atlantan knows 285 traffic moves maybe 5 mph durning rush hour here. A type personalities will also run lights and block veh's crossing over.
1:05 why there so many yellow/gold cars in that right up side ramp
its taxi day
Car convention.
@@vitothepizzaguy7475 yes 😂😂
This shit is freakier than being on acid. I'm on the wrong side of the road! It's not enough that Atlanta roads were all laid out by a team of blind, drunk surveyors, they gotta make me drive on the wrong side of the road, to boot! Crazy time.
I'm in bloody England!
Seems to me it depends on the directional traffic volumes.
Remember when that bus fell off I-75 because the signage was confusing? Be ready for a number of head-on collisions, especially from people who enter the interchange on the right, and think they are supposed to stay on the right side of the road. And how many dinner establishments in this area serve alcohol to those drivers?
Roundabouts, DDI's, SPUI's
Driver’s manual anyone??
Would off-ramp traffic be allowed to turn left on red since it's technically one-way to one-way?
no... that would cause traffic to slow down due to merging
it's supposed to work that way, that was the intended function from the diverging diamonds original designer. It's been botched by idiots who can't lane math
@@Livereater Ohhh you mean that would be worse than coming to a complete stop???
That makes zero sense, the highway ramps get backed up due to this oversight. The original designer of this interchange made it so that all exits should free-flow into the overpass with only 2 lights that each have a single cycle. This interchange has 6 lights... completely destroyed the purpose of the design.
There will still be 100+ cars every day that accidentally end up in the Lake Hearn lane when they meant to turn onto Ashford Dunwoody southbound. They will then do an illegal U-turn and travel the wrong way on a one-way street to get BACK onto Ashford Dunwoody. Is there a solution to this in the new design that the model doesn't show?
Quite unusual to see traffic flowing on the left side of the bridge, but perhaps it could work.
the lake hearn portion of the interchange looks unaltered. i don't know.... this might actually work! it's not like it could be WORSE!! south bound on ash-dunwoody at 5pm is a complete disaster as it is!
If they did not remove the ramp meters entering 285 west bound this will actually make matters worse as you will have a shorter entrance ramp since it no longer loops around and under Ashford Dunwoody.
I believe traffic from I-285 East would back up on exit ramp and would affect 285 flow. Besides diamond interchange seems risky and more accident prone.
Why not just stick a pair of roundabouts in there?
It would seem the volume of traffic is too great for a dumbbell interchange. As Justin Graham said, "These [diverging diamond] interchanges should be the standard for High Traffic interchanges and Traffic Circles should be the standard for lower traffic and rural interchanges.".
DDI's can move TWICE as many cars per lane as traditional interchanges. 2-3 MILE backups at 13 & 65 in Springfield GONE after DDI is built.
Anyone complaining about this needs to shut up & drive one first.
Yeah and don't forget about the people who try to squeeze through the red light at the end. Usually half a dozen cars will try that.
This will be a colossal clusterfuck. Is this a DOT project? Georgia, particularly the metro Atlanta area has some of the most dangerous designed roads and signage I've ever seen.
Bring a helmet and an ejector seat!
The only apparent provision for bicycles or pedestrians is a crosswalk on the far side - which goes from nowhere to nowhere. No provision for bikes or pedestrians to cross from one side of the overpass to the other. FYI, Louisville/ Superior, Colorado DDI is designed with bike lanes, as well as pedestrian walkway and bus stops down the middle.
Gonna dump more traffic onto 285 and back it up.
The fact that the exits off the highway aren't free-flowing and stopped by lights 100% defeats the entire purpose of this intersections design.
Name one service interchange type that is free flowing.
FYI, this God forsaken debacle has NOT eased traffic during rush hour. It has actually made it worse causing even more cars/trucks to back up onto the interstate. And unless you know exactly which lane you have to be in (and where you're going) before you drive into this mess, you're screwed. You know it's bad when they have t-shirts printed that says "I survived the Ashford-Dunwoody interchange".
😂😂
I don't get it.
there was an accident in the first hour of operation at the one in round rock, texas. say no more. the process on paper sounds good, as shown in this video, but if you watch it closely the traffic in real life does not move that quickly. nor does it depict rush hour volume. visualization and reality are different concepts. this may be too much for some drivers to understand as driving on the opposite side of the road is not natural except for the drunk. (travis and williamson county have notable numbers of wrong way drivers)
+powerwindow2 They are putting one of these in Sarasota at I-75 and University Parkway. With all the older drivers in the area, I predict it will be a disaster. Way too complicated.
Sorry but just because some cannot follow signs shouldn't be an excuse to make an efficient, safer interchange - which it is.
Based on your logic, we shouldn't even have traffic lights or left turns, for fear of people causing accidents as the red light is hard to notice... do you see that it's exactly the same?
However this design exists to minimize left turn conflicts, the single biggest accident source.
Lots of money spent just to eliminate left turns yes?
Not that lots of cost. Just different kind of layout.
They more cost-effective than having raised on/off ramps.
I... uh.... Yeah. Good luck with that.
If you can't figure this out you shouldn't have a license.
It so much cars and that ramp off is fulled with cars it so hard to get home,job, or a place!
All this complaining about this interchange - which nobody has even tried yet - is probably coming from the same people who also believe expanding transit is a bad idea.
That kind of leaves us with no options.
QR code gang
Yup. Because we should stop all progress and innovation because a few people are easily confused. God forbid people encounter things they are not used to.
So...what happens when we have a wreck at one of those confusing traffic lights? Huge backup!
Could you clarify something? Don't wrecks cause backups in most other situations too?
get on board with new and better ways of doing things. don't be an old fogey
Funny thing, this video shows traffic flowing smoothly but you know the idiots who set the time on the traffic lights will screw it up to have traffic at a stand still.
I drove on it for the first time at about 7:30pm Sunday just after it opened and it definitely feels weird to drive on the wrong side. I've driven in Britain so I'll get the hang of it, but most won't. I'm concerned about what will happen when lightning strikes and all (or even some) of the traffic lights go out. Yikes!
get on board with new and better ways of doing things. don't be an old fogey
This would work in some areas of Georgia, however, not in Dekalb county. Many high end companies and smart people live and work in perimeter, but the thugs and mall-rats will screw this plan up. People from Dekalb county do not know how to drive!
упячивает
I don't like traffic signals I. This concept left turning traffic stops twice before leaving the interchange. That is no different from a standard diamond interchange. The reasons I don't like traffic signals are that they are dangerous, when someone runs the red light a serious and maybe fatal sccident can occur. They cost a lot of money to the tax payers in electricity cost and equipment maintenance, and I don't like sitting and waiting for the light to turn green. I would be more in favor of a double roundabout interchange. That would entirely remove the crossovers and traffic lights. It moves more cars through the interchange faster.
I would like to see something other than some animation. Let's see a video at 6 PM on a Friday. If it really works then Great.. If not then Kill the idea along with so many highway management nightmares. I will hope for the best.
get on board with new and better ways of doing things. don't be an old fogey
So this multi million dollar expense will get us to the exit ramp faster so we can STOP and WAIT to merge onto I285 west. What a freaking cluster....... And a waste of my money.
I get what you are saying about the Buttheads. The traffic backs up onto the highways and up and down Ptree/Dunwoody because the flow is constantly interrupted. It's lame and annoying.
Things like this totally confuse the already confused obama voters
J Cleary lol!!! This is the funniest comment here 😂
not good
Do you maintain this opinion?
Alexander: Fair points, but the goal isn't about shares of the pie that is green time. The goal is to avoid backups. Where appropriate, DDIs accomplish this, thereby making *any* driver going through them likely to save time over the regular diamond interchange.