highest number of multiplexes

[corco]

Nebraska never has any more than 3 concurrent routes. If I count correctly, there are 6 such instances: I-129/US 20/US 75 in South Sioux City, US 77/US 275/NE 91 N. of Fremont, US 6/US 34/US 281 in Hastings, US 6/US 34/NE 44 W. of Minden, US 6/US 34/US 83 at McCook, and US 26/NE 71/NE 92 at Scottsbluff.

I think there's one more in Crawford-it's short so you're forgiven  

complete with semi-Iowa style arrow at the split!

and patched junction sign!

[bassoon1986]

kinda hard to see but here's the 4 in Chattanooga with a "to" I-24 shield

http://maps.google.com/maps?hl=en&ll=35.013648,-85.328419&spn=0.195424,0.364952&z=12&vpsrc=6&layer=c&cbll=35.013648,-85.328419&panoid=bIEtvtafUC5typ74DvZFkw&cbp=12,88.69,,0,6.86

[agentsteel53]

ooh found another one - I-55 crossing the MS river from Memphis to Arkansas. I'm curious as to where this is. Is it westbound Crump Blvd? And are there stand alone signs of all 5?

[url]http://www.billburmaster.com/rmsandw/tennessee/interstate/55tn.html/url]

(1st picture at the top)

in the 1960s, I-40 was piped onto there as well.  In 1963 someone I know acquired one of two gantries: I-55, US-61, US-70.  He said the other one had I-40, US-64, US-79 but he was happy just to get one.

[bassoon1986]

at the bottom of this page...US 59, US 70, US 71, US 371 at the beginning of US 371 in Dequeen Arkansas:

http://usends.com/70-79/371/371.html

so we've seen up to 4 US highways together....anywhere where there are 5 ?

[pianocello]

Well... there's US highways 31, 36, 40, 52, and 421 between exits 46 and 47 of Interstate 465 east of Indy, but they're unsigned.

[D-Dey65]

Wyoming has a few quadraplexes, my favorites being the business loops and parallel mainlines that are fully signed. Example, Douglas:

(Many other irrelevant pics snipped)
Hey, I like that combination BGS gantry/overhead traffic signal mount. But the most I've seen around me are triplexes, like for example US 41/US 98/FL 50 in Brooksville, Florida... unless you also count hidden FL 45. Chiefland has US 19/98/ALT 27 combined with a hidden concurrency between Florida State Road 320, but because SR/CR 320 is hidden, I'm not really sure that counts. I think there might be a few other county roads between Chiefland and Perry that do the same thing.

[r-dub]

Colorado has one 5-plex (quintupleplex?) east of Denver in Limon, CO.

It's signed in the field as TO SH 71, but CDOT route logs (and all signage not on the multiplex) say 71 is a continuous route. My guess is that it's signed this way to avoid a wrong-way multiplex issue. SH 71 is northbound in this picture.

Now, if you count all the unsigned US routes on Interstates in Colorado, there's quite a few multiplexes. Every now and then, CDOT throws us roadgeeks a bone and signs the US routes:

This is on WB 70 on the elevated portion just north of downtown Denver.

If only the US route signage was a little more consistent...

[Darkchylde]

Here's a four-way 'plex in Idaho:

[mjb2002]

The highest in the CSRA has been a six-plex in Augusta, Ga. and a five plex in North Augusta (only (Ga.) State Route 10 does not extend into SC).

[Ian]

New Hampshire loves their multiplexes as well. Here is a 4-route one in Rochester:

[Quillz]

Does the Spalding Turnpike have an internal number that is used by the DoT?

[Ian]

Does the Spalding Turnpike have an internal number that is used by the DoT?

The Spaulding Turnpike is NH 16 for its entire length. I'd assume that would be a multiplex.

[OCGuy81]

Corco, that's a cool shot of US 20/NE 2/ NE 71.  It's interesting how 20 is signed as East and 2 is signed as West. 

What other multiplexes have conflicting directions? (i.e. North A; South B)

[hbelkins]

What other multiplexes have conflicting directions? (i.e. North A; South B)

Too many to mention...

[bulldog1979]

If you count the Lake Michigan Circle Tour as a highway designation, then Michigan tops out at two quadruplexes: US 2/US 41/M-35/LMCT in Escanaba and Gladstone and US 31/M-37/M-72/LMCT in Traverse City. The latter has a full sign assembly at the east end of Grandview parkway with all four markers, while the former may not have a LMCT marker along the concurrency.

[ftballfan]

If you count the Lake Michigan Circle Tour as a highway designation, then Michigan tops out at two quadruplexes: US 2/US 41/M-35/LMCT in Escanaba and Gladstone and US 31/M-37/M-72/LMCT in Traverse City. The latter has a full sign assembly at the east end of Grandview parkway with all four markers, while the former may not have a LMCT marker along the concurrency.

Also, if the LMCT is counted, Michigan would have quite a few triplexes, including a 37 mile long one in SW Michigan (I-196/US-31/LMCT)

[Jordanah1]

im surprised knowone has mentionod the I39/I90/I94 concurancy in wisconsin, and the US12/US14/US18/US151 concurancy on the madison beltline

[roadman65]

The I-465 Beltway around Indianapolis actually has the most.  Although unsigned, with all State and US Routes being eliminated inside the beltway creates many overlaps.  You would need to sit down and figure this out, but I believe that the east side has the most  with US 31, US 36, US 40, US 52, SR 67, and US 421 all being together with I-465 in the vicinity of I-70 east of Indy has the most.

[mukade]

The I-465 Beltway around Indianapolis actually has the most.  Although unsigned, with all State and US Routes being eliminated inside the beltway creates many overlaps.  You would need to sit down and figure this out, but I believe that the east side has the most  with US 31, US 36, US 40, US 52, SR 67, and US 421 all being together with I-465 in the vicinity of I-70 east of Indy has the most.

... and SR 37. Hopefully soon, also I-69. That would make 9 assuming no decommissionings.

[NWI_Irish96]

The I-465 Beltway around Indianapolis actually has the most.  Although unsigned, with all State and US Routes being eliminated inside the beltway creates many overlaps.  You would need to sit down and figure this out, but I believe that the east side has the most  with US 31, US 36, US 40, US 52, SR 67, and US 421 all being together with I-465 in the vicinity of I-70 east of Indy has the most.

... and SR 37. Hopefully soon, also I-69. That would make 9 assuming no decommissionings.

As I noted near the beginning of this thread, the count is 9 currently: I-465/I-74/US 31/US 36/US 40/US 52/US 421/SR 37/SR 67.  I-69 will make 10.

[mukade]

As I noted near the beginning of this thread, the count is 9 currently: I-465/I-74/US 31/US 36/US 40/US 52/US 421/SR 37/SR 67.  I-69 will make 10.

Except US 52 and I-74 are never concurrent (they miss by one interchange) so it is 8 at the moment.

[NWI_Irish96]

I forgot that US52 got switched from the west-south part of 465 to the north-east part.  They should switch it back so they can get 10.

[NE2]

They should extend I-99 to Indy and bring back SR 100 so they can get 12.

[agentsteel53]

They should extend I-99 to Indy and bring back SR 100 so they can get 12.

if they wrap I-238 around the beltway six times, it would be 18.

[vtk]

They should extend I-99 to Indy and bring back SR 100 so they can get 12.

if they wrap I-238 around the beltway six times, it would be 18.

I think that wins the prize for most absurd hypothetical multiplex (before the joke gets old)...

I've driven through Bucyrus a lot lately and noticed the 4x overlap of state routes 4, 19, 98, and 100. They're all signed N/S, in the same way.  Are there any overlaps with 5 or more routes in the same direction?  Also interesting (maybe) about this multiplex is that 4 and 98 do not cross one another, nor do 19 and 100.