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What’s the most insane roadway concurrency in the country?

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westerninterloper:
The craziest is in Perrysburg, Ohio, where:

NB I-75, SB US 23 and East Truck US 20
SB I-75, NB US 23 and West Truck US 20

are concurrent

https://www.google.com/maps/@41.5436103,-83.6097278,3a,75y,52.02h,84.37t/data=!3m6!1e1!3m4!1sz2ZFJxDiM_dbReLL3Ly7Ww!2e0!7i16384!8i8192

dlsterner:

--- Quote from: kphoger on June 24, 2022, 03:30:35 PM ---
--- Quote from: formulanone on June 24, 2022, 08:46:14 AM ---There's also the silent four-way concurrency in Knoxville, Tennessee:


--- Quote from: Mapmikey on August 08, 2020, 03:15:01 PM ---Resurrecting the thread because I found one (albeit not fully signed):

This is in eastern Knoxville TN - https://goo.gl/maps/cj9wGmvQSussrjeo6

You are on US 11E south, US 25W north, US 70 west, and unsigned TN 9 north.  The sign says TN 168 west is to the left.

TN 168 east is also (unsigned) straight ahead.

TN 168 was extended over US 11E-70 when US 25W was moved to I-40 and 640.  Though not necessary, TN 9 was also moved with it.  Thus there was no state designation on US 11E-70 west of I-40.  They put TN 168 on it.  Maps show this and there is a TN 168 mile posting at the US 11E-11W split - https://goo.gl/maps/whkXNQMejqRuBz4U9

So while not posted, it does exist on a 0.9 mile stretch of highway in Tennessee.

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I'm glad you remembered that post.  In my opinion, it was the most earth-shattering discovery on this site, yet it went almost completely unnoticed.

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Oh, I remember that post!  The four-way concurrency has been sought after since (it seems) roadgeeking began :)

I think I suggested back then that someone (at their own risk, not my risk LOL) should make a replica sign of the unposted concurrency and ninja-install it in the middle of the night.  Take a photo and post it here for all of eternity.

paulthemapguy:

--- Quote from: StogieGuy7 on June 24, 2022, 04:03:09 PM ---Sort of true. Coming southbound, you're greeted with an END 41 interstate shield right at the border.  But, northbound is indeed marked as 41 from the merge with US-41 northward, which may be more than 1/2 mile.  There's even the only I-41 cutout shield you may ever see mounted there on the IL side of the border.

--- End quote ---

That's why my I-41 photo is the cutout on Russell Road; I really don't like unisigns. Even though this cutout shield will go away if I-41 gets truncated to Milwaukee, that's still the wiser option imo.  Either truncate it to the Zoo Interchange and have I-894 continue south, or truncate it to the Mitchell Interchange at I-94/43.


144 I-41 by Paul Drives, on Flickr

Mapmikey:

--- Quote from: Dirt Roads on June 24, 2022, 08:29:33 AM ---Mentioned before by someone else* here on AARoads long ago, but the US-119 overlap onto US-33 between Spencer and Buckhannon, West Virginia has got to be the wackiest looking concurrency on the map.  This is essentially the same routing as when US-119 was extended southward from Morgantown in 1935 (except the portion replaced by Corridor H between I-79 and Buckhannon, which is only a minor change).  The West Virginia State Road Commission wasn't interested in extending US-119 southward, but that may have not had anything to do with this wacky concurrency.

Anyhow, this east-west concurrency is approximately 85 miles long and crosses several other north-south routes along the way, including its parent (US-19).  But it all makes more sense when you do the mileage.  Charleston -to- Buckhannon via the "old road" (US-119/WV-4/US-19/WV-4/WV-20, essentially the same route as the old cross-state WV-4) is about 135 miles of winding roads.  Charleston -to- Buckhannon via the current US-119 is only a few miles longer over slightly tougher terrain, but much less windy.

For the record, nowadays the best route from Charleston -to- Buckhannon via I-79 and Corridor H is only about 114 miles and takes about 94 minutes.  You can theoretically cut off a minute by getting off at Flatwoods and taking the "old road" to Buckhannon, but I wouldn't bother.  Unless you want to visit the State Wildlife Center in French Creek.

*I seem to recall that hbelkins made such a comment, but I'm not sure.

--- End quote ---

Note that WVDOH actually requested and was approved to move US 119 to use all of today's WV 4 plus WV 20 to Buckhannon.

From the US 119 entry at the West Virginia Hwy Annex:


--- Quote ---On June 13, 1945 WVDOH requested that US 119 ALT be assigned from Clendenin to Weston using WV 4 and US 19.
AASHO replied June 27, 1945 indicating wouldn't it be better to move US 119 to the US 119 ALT route and downgrade US 119 from Clendenin to Spencer to a state highway?
On July 5, 1945 WVDOH agreed to reroute US 119 as AASHO had requested. Then AASHO cancelled the 1945 Committee meeting.
In September 1946 AASHO realized this US 119 rerouting was still out there and contacted WVDOH. in the AASHO letter they confused which route was supposed to be US 119 ALT, but did still say rerouting US 119 was still viable.
WVDOH replied in a September 27, 1946 letter that they would like to change the US 119 reroute a little by having it follow WV 4 to WV 20 then north to Buckannon.
On January 4, 1947 AASHO appears to have approved this change.
On March 1, 1947 AASHO notified mapmakers of this change in US 119. 
In December 1951, AASHO notified WVDOH that the US 119 reroute away from Spencer was never implemented on the WV State map, nor did General Draft and Rand McNally have it moved.
WVDOH replied in April 1952 that West Virginia never changed the US 119 postings and to just leave US 119 the way it was.
On April 12, 1955 WVDOH officially requested US 119 go back to its original route via Spencer.

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andy3175:

--- Quote from: formulanone on June 24, 2022, 05:46:31 PM ---
--- Quote from: kphoger on June 24, 2022, 03:30:35 PM ---
--- Quote from: formulanone on June 24, 2022, 08:46:14 AM ---There's also the silent four-way concurrency in Knoxville, Tennessee:


--- Quote from: Mapmikey on August 08, 2020, 03:15:01 PM ---Resurrecting the thread because I found one (albeit not fully signed):

This is in eastern Knoxville TN - https://goo.gl/maps/cj9wGmvQSussrjeo6

You are on US 11E south, US 25W north, US 70 west, and unsigned TN 9 north.  The sign says TN 168 west is to the left.

TN 168 east is also (unsigned) straight ahead.

TN 168 was extended over US 11E-70 when US 25W was moved to I-40 and 640.  Though not necessary, TN 9 was also moved with it.  Thus there was no state designation on US 11E-70 west of I-40.  They put TN 168 on it.  Maps show this and there is a TN 168 mile posting at the US 11E-11W split - https://goo.gl/maps/whkXNQMejqRuBz4U9

So while not posted, it does exist on a 0.9 mile stretch of highway in Tennessee.

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I'm glad you remembered that post.  In my opinion, it was the most earth-shattering discovery on this site, yet it went almost completely unnoticed.

--- End quote ---

I decided to draw it, because I usually need a visual aid for stuff like this:



--- End quote ---

Thank you for doing this map and thanks to Mapmikey and the previous posters for finding this. Wow! I agree this is a road geek holy grail to find the one place where you can go on all four directions at one time.

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