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Nebraska
The Ghostbuster:
If a new interchange is built within the vicinity of Interstate 80 between NE 31 and NE 370, would new roadways need to be built to serve the new interchange? Fairview Rd., S. 192 St., and Schram Rd. all pass over 80 along short overpass roadways. Any ramps built at these locations would connect with roadways at less than 90-degree angles, which I think is less than ideal for an Interstate corridor.
J N Winkler:
--- Quote from: The Ghostbuster on February 15, 2023, 07:36:58 PM ---If a new interchange is built within the vicinity of Interstate 80 between NE 31 and NE 370, would new roadways need to be built to serve the new interchange? Fairview Rd., S. 192 St., and Schram Rd. all pass over 80 along short overpass roadways. Any ramps built at these locations would connect with roadways at less than 90-degree angles, which I think is less than ideal for an Interstate corridor.
--- End quote ---
All of these are former section-line intersections that the I-80 right-of-way overlaps. In each case, the intersection has been replaced by two sweeping right-angle turns connected by an overpass over I-80.
The existing overpass could be reused as part of a diamond interchange variant with a dogbone or dumbbell roundabouts, but this might not be the smart choice if detailed traffic forecasts (which, it sounds like, have yet to be developed) justify widening it to four or more lanes.
mvak36:
--- Quote from: J N Winkler on February 15, 2023, 08:14:34 PM ---
--- Quote from: The Ghostbuster on February 15, 2023, 07:36:58 PM ---If a new interchange is built within the vicinity of Interstate 80 between NE 31 and NE 370, would new roadways need to be built to serve the new interchange? Fairview Rd., S. 192 St., and Schram Rd. all pass over 80 along short overpass roadways. Any ramps built at these locations would connect with roadways at less than 90-degree angles, which I think is less than ideal for an Interstate corridor.
--- End quote ---
All of these are former section-line intersections that the I-80 right-of-way overlaps. In each case, the intersection has been replaced by two sweeping right-angle turns connected by an overpass over I-80.
The existing overpass could be reused as part of a diamond interchange variant with a dogbone or dumbbell roundabouts, but this might not be the smart choice if detailed traffic forecasts (which, it sounds like, have yet to be developed) justify widening it to four or more lanes.
--- End quote ---
That area is growing so fast they probably will have to have a four lane overpass (at least) by the time they're ready to build the interchange.
mvak36:
https://omaha.com/news/state-and-regional/traffic-will-soon-flow-on-first-section-of-new-fremont-beltway/article_d80e9c14-ea0c-11ed-b611-9f78e13393e9.html
--- Quote ---Sometime Friday, without fanfare, the first car will head west from U.S. Highway 275 just south of Fremont on a brand-new strip of asphalt that is nearly two decades — and $62 million — in the making.
Weather permitting, Nebraska Department of Transportation engineers will open up the first section of the new Fremont Southeast Beltway. When it fully opens in July, the 3.2-mile stretch of road will connect U.S. 275 to U.S. Highway 77, which bisects Fremont from north to south. It's expected to carry 11,000 vehicles per day.
...
For the city, a major goal was to move truck traffic off of Broad Street, Fremont’s main north-south thoroughfare running through the heart of its commercial district. Within the city limits, it also is designated as Highway 77.
That designation will now move to the new beltway, and the city will take over control and maintenance of one of its major avenues.
“We’ll be able to go into Broad Street and make a lot of improvements,” Spellerberg said.
The beltway will have no traffic lights, but it will have two circular roundabouts at Downing Street and Main Street near the Platte River bridge, as well as “teardrop” roundabouts at U.S. 275.
It is the eastern half of the beltway — from U.S. 275 to Downing — that will open Friday. The opening was delayed from last week to avoid a conflict with a series of lane and ramp closures along U.S. 275 in Fremont, Gerbino-Bevins said.
The middle section will open next, and the western tie-in with U.S. 77 last. The formal ribbon-cutting is scheduled for July 6.
--- End quote ---
triplemultiplex:
Little annoyed they seem to be using the terms "beltway" and "bypass" interchangeably there in that article.
Also big fan of the phrase "circular roundabouts"; as if there are other kinds? :meh:
But it wouldn't be roadgeekery if something pedantic like that didn't rub me the wrong way. :P
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