- My Forums
- Tiger Rant
- LSU Recruiting
- SEC Rant
- Saints Talk
- Pelicans Talk
- More Sports Board
- Fantasy Sports
- Golf Board
- Soccer Board
- O-T Lounge
- Tech Board
- Home/Garden Board
- Outdoor Board
- Health/Fitness Board
- Movie/TV Board
- Book Board
- Music Board
- Political Talk
- Money Talk
- Fark Board
- Gaming Board
- Travel Board
- Food/Drink Board
- Ticket Exchange
- TD Help Board
Customize My Forums- View All Forums
- Show Left Links
- Topic Sort Options
- Trending Topics
- Recent Topics
- Active Topics
Started By
Message
BR Traffic Question - Displaced Left Turns
Posted on 4/18/19 at 1:12 pm
Posted on 4/18/19 at 1:12 pm
So the GDOT has proposed adding a displaced left turn to a terribly congested intersection near me. The company, Stantec cites their experience building one in BR. I'd be curious how this thing has functioned there, because by all indications it seems like a clusterfrick waiting to happen. Oncoming lanes go at the same time, but traffic crosses the oncoming lanes 100 yards down the road.
The intersection in BR is located at Airline and Siegen. Anyone want to provide feedback on how well it works (regular 18-wheeler accidents notwithstanding).
The intersection in BR is located at Airline and Siegen. Anyone want to provide feedback on how well it works (regular 18-wheeler accidents notwithstanding).
15
Posted on 4/18/19 at 1:15 pm to SM6
It’s a little goofy but it gets the job done. I’ve only seen a person going the wrong way one time.
Posted on 4/18/19 at 1:15 pm to SM6
Is this like the one on Camellia Blvd in Lafayette? If that’s the case, it works well
This post was edited on 4/18/19 at 1:16 pm
Posted on 4/18/19 at 1:16 pm to SM6
There's one in Lafayette at Camellia/Johnson but only on Camellia not the other sides of the intersection.
Seems to work alright. Doesn't have the volume of Airline & Sherwood though
ETA: Feels like you're doing something wrong the first time you use it and there's oncoming traffic on both sides of you.
ETA2: misread OP and thought they were about to put this in BR
Seems to work alright. Doesn't have the volume of Airline & Sherwood though
ETA: Feels like you're doing something wrong the first time you use it and there's oncoming traffic on both sides of you.
ETA2: misread OP and thought they were about to put this in BR
This post was edited on 4/18/19 at 1:24 pm
Posted on 4/18/19 at 1:17 pm to SM6
First day it opened, I saw folks stopped and looking around wondering wtf was going on, but it seems to be pretty efficient.
Posted on 4/18/19 at 1:20 pm to SM6
the one in baton rouge is at the intersection of sherwood forest and highway 61. i think the design was initially tried in mexico.
it has worked wonders in reducing the number of light cycles we sit through and the total time at the intersection. I think the secret is moving the left turners to the wrong side of the road well before the intersection. imagine left turns and straight traffic entering the intersection at the same time. total chaos.
now imagine the left turners crossing the oncoming lane at the same time the straight traffic starts, but they cross 1/8th of a mile down the road. by the time the straight traffic gets to the left turn intersection, the left turns have crossed and the left turn signal has turned red.
it has worked wonders in reducing the number of light cycles we sit through and the total time at the intersection. I think the secret is moving the left turners to the wrong side of the road well before the intersection. imagine left turns and straight traffic entering the intersection at the same time. total chaos.
now imagine the left turners crossing the oncoming lane at the same time the straight traffic starts, but they cross 1/8th of a mile down the road. by the time the straight traffic gets to the left turn intersection, the left turns have crossed and the left turn signal has turned red.
Posted on 4/18/19 at 1:22 pm to piratedude
Is called a continuous flow intersection or something like that.
There is a wikipedia page.
Amazing what it did to airline/sherwood.
There is a wikipedia page.
Amazing what it did to airline/sherwood.
Posted on 4/18/19 at 1:23 pm to SM6
Probably the “best flowing” major intersection in BR
Posted on 4/18/19 at 1:24 pm to fightin tigers
Awesome, that is good to know. This intersection is a nightmare during rush hour, can be 3-4 cycles for north south traffic.
The video was a very helpful illustration.
The video was a very helpful illustration.
Posted on 4/18/19 at 1:26 pm to SM6
Airline / Siegen interchange improved greatly from this. Turn that frown upside down friend.
Posted on 4/18/19 at 1:28 pm to fightin tigers
quote:That is exactly what it's called. Or CFI for those in the industry lol.
Is called a continuous flow intersection or something like that.
And yes, they work great, assuming you have the space to construct them. I occasionally see one idiot get stuck in the middle of the intersection while the other cars pass, but that's only because they tried to run the red light. They actually get stuck in a protected area, so it's not like they're blocking anyone from crossing.
This post was edited on 4/18/19 at 1:31 pm
Posted on 4/18/19 at 1:30 pm to SM6
quote:
The company, Stantec cites their experience building one in BR.
The company was ABMB when they did the one in BR. Stantec acquired ABMB in 2012. So that office in Georgia had nothing to do with BR's CFI.
Posted on 4/18/19 at 1:30 pm to SM6
It works better than what was there before, but in the long run it should have been a separated grade.
Posted on 4/18/19 at 1:33 pm to MikeD
quote:
Airline / Siegen interchange improved greatly from this.
Yes but I still wonder if 6 laning Airline would have worked better. That’s the thing - yes, it works. is it the best solution? i guess that depends.
Posted on 4/18/19 at 1:35 pm to SM6
I use it all the time and it has helped
Posted on 4/18/19 at 2:01 pm to doubleb
I think it has worked quite well. As others said, it can be a little confusing at first but you figure it out and for such a major intersection it doesn't have near the problems of other, much less traveled, intersections in this city.
Posted on 4/18/19 at 3:13 pm to SM6
The CFI at Airline/Siegen in BR flows better than most intersections in town. The only thing that fricks with the flow on the Airline side is traffic backing up from the next intersection down at Jefferson Hwy.
Posted on 4/18/19 at 3:31 pm to SM6
It works fine. If we can manage and you can't, you might want to check your city's water supply for lead.
Posted on 4/18/19 at 3:40 pm to SM6
the CFI in baton rouge works great. don't worry about us. y'all on the other hand may have some issues with that design.
i'm seeing only one lane for the northbound left. that alone seems counter-intuitive. the justification for CFIs are usually heavy left turn movements backing up the through movements. if the left turns are so heavy, why aren't those double lefts?
almost the same comment on the southbound left...you can see there is a single left lane for storage, then it opens up to a double as it crosses the opposing throughs. if two lanes are justified after the crossing, then they should be used for the storage as well. if not, that's just gonna back up.
and you said stantec, but it looks like arcadis did these sheets. hopefully whoever did the CFI in BR will have some input on the final design.
i'm seeing only one lane for the northbound left. that alone seems counter-intuitive. the justification for CFIs are usually heavy left turn movements backing up the through movements. if the left turns are so heavy, why aren't those double lefts?
almost the same comment on the southbound left...you can see there is a single left lane for storage, then it opens up to a double as it crosses the opposing throughs. if two lanes are justified after the crossing, then they should be used for the storage as well. if not, that's just gonna back up.
and you said stantec, but it looks like arcadis did these sheets. hopefully whoever did the CFI in BR will have some input on the final design.
Page 1 of 2
Popular
Back to top
Follow TigerDroppings for LSU Football News