Most number of highways sharing the same multiplex

[agentsteel53]

Slight nitpick - U.S. 385 is part of the roundabout, but not U.S. 87. U.S. 87 does not enter Oklahoma.

that's the one!  Tough to remember 'em all

I really need to upload my photos - there is an error US-325 shield in the circle that is worth noting too.  All the 3 shields are cleavers by now.

[thenetwork]

Back in the day (40's-50's) Downtown Cleveland at Public Square would have won the title in Ohio.

Southbound Ontario St @ Euclid Avenue, you would have had this multiplex:

SR-8
SR-14
US-21* (downgraded to state route, truncated @ I-77, Exit 157)
SR-43* (truncated at SR-14 at the Broadway/Miles/E.93rd/Turney/Warner Road "interchange")
SR-87* (truncated at SR-8/US-422 at the Intersection of East 55th/Orange/Woodland Avenues)
US-422

(* - denotes routes since truncated)

Within Public Square, these 6 routes at one time or another connected with:

SR-2 (relocated to Shoreway)
SR-3* (truncated at US 42 at Pearl/Ridge Road intersection)
US-6
US-20
US-42
SR-283*  (truncated at SR-2/I-90 at Lake Shore Boulevard Exit)
US-322

No less than 13 numbered routes at 1 terminus!!!

[mightyace]

Back in the day (40's-50's) Downtown Cleveland at Public Square would have won the title in Ohio.

...

No less than 13 numbered routes at 1 terminus!!!

Having worked on Public Square for a few years in the early nineties, I new a lot of stuff still converged at/near there.  And, even though I've looked at some old maps, I didn't know it was that many at one time.  WOW!

[getemngo]

Please tell me that Michigan has more than 3 concurrent highways somewhere.  US-2/US-41/M-35 is the most I can think of.

[leifvanderwall]

Hmmm. Let's see  There's....

US 31/M-37/M-72 in Traverse City, US 141/US 2/M-95 in Iron Mountain, US 131/M-66/M-72 in Kalkaska, BUS 75/M-32/F-42 in Gaylord, BUS 94/BUS 127/M-50 in Jackson

[City]

Okay.... let me think....

I-40/BL-85/US-29/US-220/US-70/US-421 - Near downtown Greensboro, NC.

But that Indianapolis Beltway segment is the record. (There's 8 multiplexed there, counting SR-67)

[Alex]

Okay.... let me think....

I-40/BL-85/US-29/US-220/US-70/US-421 - Near downtown Greensboro, NC.

But that Indianapolis Beltway segment is the record. (There's 8 multiplexed there, counting SR-67)

U.S. 421 was removed from that overlap and realigned onto Painter Boulevard earlier this year...

[hbelkins]

U.S. 421 was removed from that overlap and realigned onto Painter Boulevard earlier this year...

Signage doesn't indicate such.

[froggie]

According to Adam Prince's blog, signage has at least since June...

[Alex]

U.S. 421 was removed from that overlap and realigned onto Painter Boulevard earlier this year...

Signage doesn't indicate such.

Signage is now posted along Painter Boulevard for U.S. 421. See Bob Malme's September 19 post at http://surewhynotnow.blogspot.com/2009/09/latest-greensboro-loop-visit.html for some photos.

[hbelkins]

My bad. I thought you were referring to US 421 in Indianapolis, not Greensboro.

[yakra]

For all Maine's copious multiplexing, triplexing and quadruplexing, the Pine Tree state can only muster a single, uhh... help me out here; is it a Quintuplex or a Pentaplex? - and that's with one of the routes unsigned. According to the definition of ME121 in the route logs, it's carried along the entire US202/ME4/11/100 quadruplex in Auburn. Signage in the field has it ending as a useless duplex with ME11, as it meets US202 & pals.

The other eleven quadruplexes:
US201A/ME8/43/148, US202/ME3/9/32, US202/ME11/100/135, ME6/15/16/150, ME23/43/151/152,
US202/ME4/26/100 & US202/ME4/26A/115 adjacent to one another in Gray, and last but not least:
US201/202/ME9/100, US202/ME11/17/100 & ME8/11/27/104 all spider-webbing out from the Augusta traffic circles, which are connected by US201/202/ME17/100

I've not attempted to make a list of all the triplexes, and fuhgeddabout the duplexes - such an effort would send me to the nearest mental bin.

[froggie]

Quintuplex.


Here's the list I compiled for Minnesota.  The most the Gopher State can manage is a triplex, though we manage to have 8 of those, plus at least 2 known former ones.  Disregard what I have on the list...the US 14/US 61/MN 16 is a former now.

[Morriswa]

What is the biggest concurrency from Georgia?  I know there is a 7-route one near Folkston.

[mcdonaat]

Here's a fiver from Mississippi:

I've always found it weird to see US highways multiplexed onto an Interstate. You'll be hard pressed to find that here, with the exception of US 51/I-55 where it's too expensive to maintain both a four lane, twenty-five mile bridge, and a two lane bridge of the same length. Right after the Manchac Swamp Br, the highways split.

[national highway 1]

Can't think of any offhand, but does anyone know the most multiplexed routes on a multiplex in California?

[The High Plains Traveler]

New Mexico not allowing its state routes to run concurrent with any other route limits the potential number of concurrent routes. The only technical quadriplex is I-25/U.S. 85/U.S. 285 and U.S. 84 for a short distance east from Santa Fe, but New Mexico doesn't acknowledge U.S. 85's existence anywhere in the state and doesn't post the other two routes along their concurrency with I-25.

I can think of a few three-fers off the top of my head, I-10/U.S. 70/U.S. 180 from Deming to Las Cruces (the U.S. routes aren't posted), I-10, the unacknowledged U.S. 85, and unmarked U.S. 180 from Las Cruces to the Texas line; a short triple in Carlsbad with U.S. 62-180 and 285; and U.S. 60, 70 and 84 from Clovis east to the Texas line, the latter two of which are probably the only fully posted triplexes.

[mcdonaat]

The only ones I know of in Louisiana are I-49/US 167/US 71 Byp in Alexandria on one end of Exit 84, and 49/71 Byp/La 28 on the other. You also have US 71/165/La 28 on surface streets. Back before 1955, when every US highway was paired with a state highway, the OK Allen bridge in Alexandria had US 71/US 165/US 167/La 1/La 5/La 99.

[Morriswa]

What is the biggest concurrency from Georgia?  I know there is a 7-route one near Folkston.

I'm not sure if it has been mentioned, yet, but it is US 1/US 23/US 301/GA 4/GA 15/GA 23/GA 121.

[bassoon1986]

The only ones I know of in Louisiana are I-49/US 167/US 71 Byp in Alexandria on one end of Exit 84, and 49/71 Byp/La 28 on the other. You also have US 71/165/La 28 on surface streets. Back before 1955, when every US highway was paired with a state highway, the OK Allen bridge in Alexandria had US 71/US 165/US 167/La 1/La 5/La 99.

Also in Farmerville there is LA 2, LA 15, and LA 33

Minden has US 79, US 80 and LA 159

Bastrop to Mer Rouge: US 165, US 425, LA 2

A couple of other tiny ones on 425:
-US 425, LA 137, LA 584 b/w Rayville and Archibald
-US 425, LA 15, LA 132 in Mangham
-US 425, LA 15, LA 4 in Winnsboro
-US 425, LA 15, LA 128 in Gilbert
-US 425, LA 15, LA 562 in Wisner

Also:
US 84, US 371, LA 1 west of Coushatta

2 different ones in Campti:
US 71, US 84 with LA 486 and then LA 480

[Darkchylde]

The only ones I know of in Louisiana are I-49/US 167/US 71 Byp in Alexandria on one end of Exit 84, and 49/71 Byp/La 28 on the other. You also have US 71/165/La 28 on surface streets. Back before 1955, when every US highway was paired with a state highway, the OK Allen bridge in Alexandria had US 71/US 165/US 167/La 1/La 5/La 99.

Also in Farmerville there is LA 2, LA 15, and LA 33

Minden has US 79, US 80 and LA 159

Bastrop to Mer Rouge: US 165, US 425, LA 2

A couple of other tiny ones on 425:
-US 425, LA 137, LA 584 b/w Rayville and Archibald
-US 425, LA 15, LA 132 in Mangham
-US 425, LA 15, LA 4 in Winnsboro
-US 425, LA 15, LA 128 in Gilbert
-US 425, LA 15, LA 562 in Wisner

Also:
US 84, US 371, LA 1 west of Coushatta

2 different ones in Campti:
US 71, US 84 with LA 486 and then LA 480

One you missed - LA 10, 16 and 25 in Franklinton.

[The High Plains Traveler]

Quintuplex.


Here's the list I compiled for Minnesota.  The most the Gopher State can manage is a triplex, though we manage to have 8 of those, plus at least 2 known former ones.  Disregard what I have on the list...the US 14/US 61/MN 16 is a former now.

If you go waaaaay back (pre-1960) there was at least one Minnesota 4-route concurrency: University Avenue from Minneapolis to St. Paul carried U.S. 12-52 and MN 56-218.

[NE2]

Not counting underlying state routes, there is one quad-plex in FL. US 17/US 23/Alt US 90 (unsigned)/SR 228 share pavement for at least one block.

Signs on Laura Street notwithstanding, US 90 Alt has been rerouted out of downtown Jax for a while. There used to be a four before US 17 was rerouted: US 1/US 17/US 90/SR 228 on Main/Ocean.

[djsinco]

Here's a fiver from Mississippi:

I've always found it weird to see US highways multiplexed onto an Interstate. You'll be hard pressed to find that here, with the exception of US 51/I-55 where it's too expensive to maintain both a four lane, twenty-five mile bridge, and a two lane bridge of the same length. Right after the Manchac Swamp Br, the highways split.

This MS example is traveling in 3 cardinal directions at once. If someone can come up with a picture of one running all four directions at once, that would be ridiculously awesome!

[PHLBOS]

December 27th, 1966.

Note the '67 Ford LTD coupe on the Ford dealership billboard in the background.