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Started By
Message
re: BR Advocate Letter to Editor Solves I-10 Loop Problem
Posted on 1/19/26 at 6:40 pm to Woodlands Tigah
Posted on 1/19/26 at 6:40 pm to Woodlands Tigah
quote:
Time to call this guy...
Seems like it would be possible and not cost anything
Loading Twitter/X Embed...
If tweet fails to load, click here. quote:
Announcing the Tunnel Vision Challenge! Pitch us your best 1-mile tunnel idea (Loop, freight, pedestrian, utility, etc.), we'll pick a winner, and build it…for free!
Details:
boringcompany.com/tunnelvision
Criteria:
-Usefulness (good bang for the bore)
-Stakeholder Engagement (get hyped)
-Technical, Economic, and Regulatory Feasibility (success is physically possible)
Prufrock was designed to build mega-infrastructure projects in a matter of weeks instead of years - so let’s build!
This post was edited on 1/19/26 at 6:42 pm
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Posted on 1/19/26 at 6:44 pm to tigeralum06
I have spent too much time thinking about this for the Crescent City Connection, top span with no exits until Metairie
Posted on 1/19/26 at 7:11 pm to HeadSlash
quote:
Upgrade the old bridge and airline hwy. Truck bypass route. You're welcome
They need a route where people coming rom Lafayette can get to I-12 without going through downtown BR. Easiest way to do it is split the interstate about 5 miles before the bridge and connect it with 190 around Westover. Upgrade 190 there and the old bridge and then have an elevated Basin bridge like expressway over the Comite river all the way to right before denham springs. Will it happen, hell no. Would it be way too expensive, big time. But it'd fix it
Posted on 1/19/26 at 8:38 pm to Shorty_price
quote:I did not know this. Thank you for sharing
Mobile's tunnels were actually built above ground, in a nearby shipyard, delivered by barge to the Mobile River, then sunk. They don't actually go "under" the river, per se. They just sit on the bottom.
Posted on 1/19/26 at 8:40 pm to titmouse
Will need a study.
Posted on 1/19/26 at 8:41 pm to titmouse
Some local engineer and state senator proposed a plan that would make a bypass around Baton Rouge by improving Highway 1 to tie in with the bridge at Luling (and possibly the 610 bridge). The estimated cost of the entire project was less that the cost of building one bridge across the Mississippi, but wasn't considered because it would adversely affect "historic Plaquemine."
Posted on 1/19/26 at 8:53 pm to real turf fan
What is a tunnel on top of the water called, turf?
Posted on 1/19/26 at 8:58 pm to titmouse
The question isn't the engineering.
The question is where to put it and what roads to connect it to.
The corridors available are pretty much non-existent at this point without massive displacement of residential neighborhoods. Tunnel vs. bridge doesn't change that.
The question is where to put it and what roads to connect it to.
The corridors available are pretty much non-existent at this point without massive displacement of residential neighborhoods. Tunnel vs. bridge doesn't change that.
Posted on 1/19/26 at 9:02 pm to HeadSlash
quote:
Upgrade the old bridge and airline hwy. Truck bypass route. You're welcome
This.
Posted on 1/19/26 at 11:17 pm to Tchefuncte Tiger
quote:
Some local engineer and state senator proposed a plan that would make a bypass around Baton Rouge by improving Highway 1 to tie in with the bridge at Luling (and possibly the 610 bridge). The estimated cost of the entire project was less that the cost of building one bridge across the Mississippi, but wasn't considered because it would adversely affect "historic Plaquemine."
I’m beating a dead horse at this point, but the published traffic data shows that a small percentage of I-10 bridge crossings would be affected by this.
The data shows that less than ~10% of westbound crossings originate from I-10 past Ascension. (It’s not clear how much less than 10% comes from I-10 past Ascension because they only listed the top 5 trip origins.)
In other words, vehicles traveling between I-10 west of Port Allen and I-10 east of Ascension make up a tiny portion of total daily traffic on the bridge. Most of the vehicles crossing the bridge have origins or destinations in East Baton Rouge parish. And that’s total average daily traffic.. without even accounting for the fact that the numbers are skewed more toward local traffic during peak congestion.
Contrary to popular belief, bypassing BR altogether doesn’t fix the issue. And if you were going to build a bypass around BR, you’d be better off doing a North bypass to I-12.. which is harder and still doesn’t have the impact people expect. They need more capacity to get people into/out of Baton Rouge, not around it.
Posted on 1/20/26 at 8:18 am to lostinbr
quote:
The data shows that less than ~10% of westbound crossings
What about eastbound? This seems to be the big problem on I-10/MRB due to a terrible design flaw of the eastbound off ramp of the bridge.
This post was edited on 1/20/26 at 8:34 am
Posted on 1/20/26 at 8:59 am to tigeralum06
I have repeatedly said this also. With an exit only at airline
Posted on 1/20/26 at 9:01 am to The Cool No 9
quote:
The miss isn't just a calm flowing or steady river it's a massive ordeal with currents flowing in any direction in real time not to mention an unreal amount of water
That’s why the tunnel would go under the water and not through it
Posted on 1/20/26 at 9:03 am to titmouse
Who would get the contract?
Posted on 1/20/26 at 10:27 am to Tchefuncte Tiger
quote:
What about eastbound? This seems to be the big problem on I-10/MRB due to a terrible design flaw of the eastbound off ramp of the bridge.
So the way they presented the data makes it hard to say exactly. They used StreetLight, which is a dataset built up from mobile device data (as I understand it). They broke BR and the surrounding area up into “zones” for origins & destination of bridge crossings. There were 2 zones for I-10 outside of the model area (one for I-10 past Port Allen, and one for I-10 past Ascension).
The issue is that the technical report doesn’t include full data for all eastbound and westbound crossing origins and destinations for every zone. Instead, they only included the top 5 origins in each direction. This is what it looks like:
So two things:
1. I-10 External (zone 3016 on the east side of BR) didn’t make the top 5 westbound origins. So I don’t have the exact percentage, but we know it’s less than 10.6%.
2. We don’t know what the westbound crossing destinations look like in detail. However, I think it’s reasonable to assume that on average, westbound destinations should roughly align with eastbound origins.
There is the following snippet which offers some additional clarity:
This is the model they developed from the data, rather than the actual StreetLight data itself. The width of each bar corresponds to a volume of average daily eastbound traffic across the I-10 bridge. You can see how the bar is widest on the bridge itself (since that’s 100% of the volume) and quickly falls off as you get to I-10 and I-12 further east. This is a result of traffic exiting the interstate.
To my eye, it looks like something like half of the eastbound bridge traffic exits before the 10/12 split.
Posted on 1/20/26 at 11:15 am to titmouse
About the River bottom at BTR. When the new bridge was built it was found that the soil was strong enough to support bridge footings 130 to 180 ft below the river bottom. A tunnel could bored below that depth. You could then sell all the seeping river water to cool a mega-data center built above, beside, below the road bed. Win win for Musk.
Posted on 1/20/26 at 5:04 pm to The Cool No 9
quote:
If it could be done under Mobile Bay then this would have to be scaled way way up to be safe.
How deep is the water and tunnel at Mobile Bay? How deep is the river at Baton Rouge? I've worked for a Geotechnical Engineering firm (soil testing company) that informed drillers at what depth to lay gas lines etc. They had to be under clay and above gravel. If memory serves the Mississippi just North of Baton Rouge was some 50-75 feet to the bottom and we had to go to about a total of around 400-600 feet to reach gravel, taking boring samples every 50 feet. It's a total of 600 feet,which is the Baton Rouge aquifer, to hit gravel. Pretty huge project to build an interstate tunnel under the Mississippi River is my guess why it'll never happen.
Posted on 1/20/26 at 5:23 pm to doubleb
quote:
The old bridge plus Airline Hwy. was the first BR bypass. It was constructed in 1940 and extended from the bridge to the Nesser overpass.
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