Yes, I staked it.
Beats me, but I'll bet that more than one Engineer was involved.
😉
Change order
We have one something like that not too far from here dating to the early or mid 1960's. The original plans said do it this way. When a certain well-heeled local business man realized how this alignment would create problems for his firm he spent a great deal of time and a bunch of "grease" with the fellows in the state legislature. Suddenly, a realignment was called for, but the overpass had already been built.
They're preparing to shift the traffic lanes from the part they're working on to the part they're going to work on. The only curious thing about the "Jersey barriers" is that they're not segmented. Perhaps they molded them in one piece because they think the construction will take another year or more. Go figure.
Some sort of intermediate (versus LONG-term) configuration, perhaps...?
Another possibility... they may have had some very costly R/W acquisition issues, e.g., toxic landfill, etc. and abandoned the original concept even though construction had already occurred. Good head-scratcher, for sure.
The only superior evidence is that which you haven't yet found.
Perhaps a multi-phase project where some sort of realignment was required due to, e.g., costly unforeseen R/W acquisition issues, intermediate but long-duration configuration, etc.
The only superior evidence is that which you haven't yet found.
On the third pic whoever is operating the slipform machine either needs to seriously recalibrate it or be drug tested. 😎
That or somebody on site is adding too much water to the concrete.
FL/GA PLS., post: 448110, member: 379 wrote: On the third pic whoever is operating the slipform machine either needs to seriously recalibrate it or be drug tested. 😎
That or somebody on site is adding too much water to the concrete.
Everyone uses too much water in thier concrete..
thebionicman, post: 448121, member: 8136 wrote: Everyone uses too much water in thier concrete..
I believe that! It's because the finishers bitch that it's too hard to work with before the pour. You ought to watch them pour slabs for new housing construction down here. The amount of water added to the mix reduces it from 3-4K psi to about 1K psi. 😎
Here's the skinny as I understand it.
This is the new intersection between existing I24 and new I69 at Calvert City, Ky. I69 runs southwest with I24 until it splits off here and goes toward Memphis along the former Purchase Parkway, which is being upgraded to Interstate standards. There was a cloverleaf here, but the intersection is being upgraded to eliminate that and have thru traffic for both interstates with no slowdowns. The bridge is where eastbound 24 crosses over southbound 69. 24 is 49.5' between the barrier walls, and 69 is 55' wide with vertical MSE walls under the bridge. They cross at about a 60 degree angle, which makes the bridge 238' end to end along the centerline. In order to span that distance they couldn't economically use concrete beams, and steel beams would have had to be so tall that the grades wouldn't work with the available R/W and constraints at each end. So, they designed it with 135' concrete beams and turned them cattywompus to the road. Looks screwy, but they say it's the best option they could come up with.
I bet it's a pain to figure deflection grades on that one!
James
Here is my favorite. This over-pass was built in the mid 90's as part of Portland's west side light rail. It never has or ever will have a purpose. 
