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Old 02-02-2018, 05:04 AM
 
2,053 posts, read 822,776 times
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Purely for entertainment purposes only but for some reason I'm quite fond of PIB's complex Super Arterial interchanges with the surface streets and SPUI's intermixed with frontage roads and Texas U-Turns(making their traffic signals only more complex) -- Also note once more that these are NOT just SPUI's, but consist of actual frontage roads along with SPUI's and while Texas Freeways mostly have frontage roads and Texas U-Turns, almost none of them consist of SPUI's

..and I realize that these are not actual "clones" of PIB, but merely share the same design but I wanted to post a few...

===========

U.S. 19 in Clearwater FL

https://goo.gl/maps/82MCUzUUeAE2

https://goo.gl/maps/L2fXzXjvkL92

I have been watching the construction of this limited access portion closely over the years of its upgrades. Its a fairly new section upgrade as the segment used to be entirely at-grade and I could only imagine, congested as it is one of the main arteries to go to downtown Tampa and there are seemingly no limited access routes within the vicinity. I'm not sure how much (if any) it has impacted traffic but it seems like a efficient design given the area and its purpose.

While Florida certainly has several variations of expressways, I believe that this is the only one of its design in the entire state.

===========

SR 51 & SR 101 both in Pheonix AZ

https://goo.gl/maps/nZrRmNo2UDH2

https://goo.gl/maps/rnoLLGxiK1L2

Arizona, Nevada, and Utah show fascinations of building SPUI interchanges, they have a TON of them, however; only a few are configured exactly like PIB as we know it (with access roads).. SR 51 and SR 101 has a few interchanges in this exact configuration but doesn't maintain these standards throughout their entire alignment.


Actually... That was all I could find... Anyone know any others?
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Old 02-02-2018, 06:17 AM
 
Location: Kirkwood
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Memorial Pkwy Huntsville, AL
https://www.google.com/maps/@34.7400...!3m1!1e3?hl=en
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Old 02-02-2018, 06:24 AM
 
609 posts, read 366,952 times
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I'm not sure exactly what you mean due to the TLAs, but do you mean like Peachtree Industrial and Winters Chapel?


https://www.google.com/maps/@33.9313...7i13312!8i6656
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Old 02-02-2018, 06:35 AM
Status: "Apparently not a person." (set 25 days ago)
 
5,081 posts, read 3,305,503 times
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Have no idea what most of these acronyms mean...PID, SPUI, TLA...
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Old 02-02-2018, 06:39 AM
 
Location: Kirkwood
23,381 posts, read 17,559,252 times
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SPUI- Single Point Urban Interchange. Local example is Lenox Rd at 400.
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Old 02-02-2018, 08:36 AM
 
2,053 posts, read 822,776 times
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Quote:
Originally Posted by cqholt View Post
I completely forgot about that highway and holy cow it looks EXACTLY like PIB.

https://www.google.com/maps/@34.7399...mVNg!2e0?hl=en

&

https://www.google.com/maps/@33.9313...uogVb5ZosA!2e0

Quote:
Originally Posted by Thulsa View Post
I'm not sure exactly what you mean due to the TLAs, but do you mean like Peachtree Industrial and Winters Chapel?


https://www.google.com/maps/@33.9313...7i13312!8i6656
Yes basically. I'll explain it a bit further.

Quote:
Originally Posted by samiwas1 View Post
Have no idea what most of these acronyms mean...PID, SPUI, TLA...
I think you meant PIB / or maybe you did mean PID, either way though thats an acronymn in short for Peachtree Industrial Blvd

SPUI is a short name for "Single Point Urban Interchange" which is a certain type of interchange of which all exiting and entering traffic for both sides of the highway is controlled at one central intersection instead of two seperate intersections, generally consolidating the traffic light into one traffic light and allows for all traffic turning left to turn at the same time instead of seperate phases. I personally find them to be more efficient than standard diamond interchanges. Whether they are more efficient than Diverging Diamonds (Pleasant Hill Rd & I-85, Jimmy Carter Blvd & I-85, Ashford Dunwoody Rd & I-285, Windy Hill Rd & I-75) is subjective and entirely depends on how the interchange was configured, traffic light timing, if it allows protected right turns on red, ect...

PIB uses a special SPUI however that is pretty rarely used throughout the country in the aspect that these SPUI's are ALSO accommodated by access roads of which proceed through the intersection which allows for traffic to proceed straight and not being forced to turn at the intersection. Overall less efficient than normal SPUI's due to the additional necessary signal phases but I personally believe it does a great job at handling exiting and entering traffic from the main carriage due to the optional additional capacity of the access roads/
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Old 02-02-2018, 08:39 AM
 
Location: Kirkwood
23,381 posts, read 17,559,252 times
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Quote:
I completely forgot about that highway and holy cow it looks EXACTLY like PIB.
Do you mean suburban sprawl?
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Old 02-02-2018, 08:53 AM
 
2,053 posts, read 822,776 times
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Quote:
Originally Posted by cqholt View Post
Do you mean suburban sprawl?
I mean in general the area and the actual highway itself... and...while Huntsville certainly has sprawl, there's no way I could put it in the category as a contender to Atlanta in that arena.
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Old 02-02-2018, 12:24 PM
 
Location: Georgia native in McKinney, TX
7,388 posts, read 10,070,264 times
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This is a great way to increase traffic flow in an already developed area. However, I like the design of Central Expressway (US 75) from downtown Dallas to I-635 as the limited access portion is below grade and the access road and connecting overpasses are at grade. Gives a much more connected feel to either sides of the freeway instead of the highway feeling like a wall or a barrier. Probably a good bit more expensive to build, but worth it in terms of ambiance.

https://www.google.com/maps/@32.8361...2!8i6656?hl=en


Cobb Parkway rebuilt along these lines could rejuvenate that corridor and provide relief to 75. Incorporate HRT into the design as well.
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Old 02-02-2018, 12:54 PM
 
Location: Atlanta
403 posts, read 319,872 times
Reputation: 215
Atlanta, Georgia

https://goo.gl/maps/xjHzrHogQXF2
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