Regional Boards > Mountain West
Bangerter Highway
i-215:
Unlike Bangerter Highway, Mountain View is designed from the ground up to Interstate standards, though it will likely never join the Interstate system.
MVC cost several billion dollars. Utah couldn't afford it in 2009. So the state had two choices:
* Collect private capital (investors), turn the toll concession over to them, and let them toll us for many decades to recoup their investment, plus interest and a handsome profit
* Build what the state could afford, decade by decade, until the project is finished
After outrage from westsiders, the state wisely chose the second option. MVC will eventually get all of its bridges, with the first phase being the Herriman Freeway in 2027. Other bridges (3500 S) are funded before 2030, though I'm not sure how soon.
US 89:
--- Quote from: Anthony_JK on June 09, 2023, 01:56:23 AM ---The 201 interchange isn't a Breezewood, because the Bangerter mainlaines will pass over adjacent to the SPUI point of intersection with the off-ramps. It's more like a "3-level SPUI" than anything else. It may not need upgrading to a full stack/fully directional interchange for a while.
--- End quote ---
At this point I don't see a need for a free-flow full stack. The main reason that DDI is so bad is because DDI's don't work super well if there's a significant amount of through traffic on the cross street, since you obviously can't let both directions go through at the same time. That means it's really a poor choice to put on an expressway like Bangerter where you can expect a decent amount of through traffic, even if the dominant movement is 201 west to Bangerter south and vice versa. This design removes most through traffic on Bangerter entirely. If they can design that SPUI so that the west-to-south left turn is prioritized and those extra lights are kept green most of the time, the interchange should flow much smoother.
The problem here is that 1980s-UDOT had no foresight and didn't anticipate the amount of development that ultimately happened in the west side of the Salt Lake Valley, so no extra right of way was reserved and the connections around that area weren't planned well. As a result, we now have development all the way up to the original diamond ramps - and that's industrial development instead of something like a few houses, which I'd imagine is quite a bit more expensive to relocate. Plus a lot of that industrial park area can only be accessed easily from Bangerter using cross streets very close to 201 (1820 South, S. Frontage Rd). So at this point, not only is the cost of ROW going to be prohibitively expensive, but you can't build an interchange that's big enough it blocks access to these industrial areas. Given those restrictions, this is probably the best 2020s-UDOT could come up with and I don't think we'll be too much worse off for it.
I don't think we'll ever need a full set of free-flowing ramps as some of those movements are simply used much less than others (east-to-north, for example, is basically only for people going from Magna to the airport and will never serve anything more beyond whatever local industrial development occurs). Some would eventually be nice to have, especially the west-to-south connection if and when that movement outgrows the SPUI, but traffic is going to have to get really bad to justify how much that's going to cost.
Mountain View is the way it is because 2009-UDOT learned from the mistakes of 1980s-UDOT. It will take a while to see full build-out, but that highway will never see the right-of-way issues that have plagued nearly every Bangerter upgrade project like this one.
Plutonic Panda:
Either a free flowing stack should be built for efficiency and safety purposes.
US 89:
Preliminary work is beginning on the last four interchanges not associated with the 41st South to 201 project. The three in the south end of the valley - at 98th South, 134th South, and 27th West, are being combined into one "Bangerter South" project. Current timeline for that is shown below:
Construction at 47th South won't start until next summer because the Jordan Valley Aqueduct has to be relocated first. When all is said and done, 47th and 134th will be freeway-under SPUIs, and 27th West will be a freeway-over SPUI. The 98th South and 27th West interchanges will be the first non-SPUIs built on Bangerter; they will instead be "tight diamonds" - freeway-over at 27th and freeway-under at 98th.
Great Lakes Roads:
--- Quote from: US 89 on November 06, 2023, 11:02:02 PM ---Preliminary work is beginning on the last four interchanges not associated with the 41st South to 201 project. The three in the south end of the valley - at 98th South, 134th South, and 27th West, are being combined into one "Bangerter South" project. Current timeline for that is shown below:
Construction at 47th South won't start until next summer because the Jordan Valley Aqueduct has to be relocated first. When all is said and done, 47th and 134th will be freeway-under SPUIs. The 98th South and 27th West interchanges will be the first two non-SPUI built on Bangerter; it will instead be a "tight diamond".
--- End quote ---
Fixed your information on the 27th West interchange... it will be a tight diamond interchange, not a SPUI.
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