Most number of highways sharing the same multiplex

[agentsteel53]

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.

here is a 1937 photo which is missing 56.

http://www.shorpy.com/files/images/SHORPY_8b29416a.jpg

when did 56 come in?

[hbelkins]

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!

Way back when on MTR, someone posted that such an example exists in Massachusetts, but i have been unable to find that post on Google Groups (someone must have had x-no-archive-yes activated) nor have I been able to find the example on the map. My fading memory seems to think it involved MA 2 as one of the routes, however.

[djsinco]

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!

Way back when on MTR, someone posted that such an example exists in Massachusetts, but i have been unable to find that post on Google Groups (someone must have had x-no-archive-yes activated) nor have I been able to find the example on the map. My fading memory seems to think it involved MA 2 as one of the routes, however.

MA sounds like a likely candidate, but my top pick would be PA, since so few of the roads in that state run true north-south, or east-west. Thanks for trying, will stay tuned.

[agentsteel53]

Way back when on MTR, someone posted that such an example exists in Massachusetts, but i have been unable to find that post on Google Groups (someone must have had x-no-archive-yes activated) nor have I been able to find the example on the map. My fading memory seems to think it involved MA 2 as one of the routes, however.

I'll bet it had something to do with the MA 2-US 3-MA 16 intersection.

the Boise City, OK roundabout might have at one point had something that qualifies.

[djsinco]

I don't think I would count any roundabout; even one which has been improved upon by a  bypass that has elimitanted all the truck traffic.

[The High Plains Traveler]

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.

here is a 1937 photo which is missing 56.

http://www.shorpy.com/files/images/SHORPY_8b29416a.jpg

when did 56 come in?

1934, when the major renumbering of highways took place. Actually, U.S. 52 and MN-218 were also established that same year. MN-56 was split in 1960, with the segment north of Minneapolis becoming MN-47 and 56 being terminated in downtown St. Paul, eliminating the University Avenue hyperplex. I think I have a map (MN official or otherwise) showing all four routes on that segment.

That link goes to Route 404, by the way (unless my work firewall is blocking it, and I don't see the usual net nanny message).

[bob7374]

Way back when on MTR, someone posted that such an example exists in Massachusetts, but i have been unable to find that post on Google Groups (someone must have had x-no-archive-yes activated) nor have I been able to find the example on the map. My fading memory seems to think it involved MA 2 as one of the routes, however.

I'll bet it had something to do with the MA 2-US 3-MA 16 intersection.

Technically, MA routes 1A and 3A run concurrently with their parent routes between their sections north and south of Boston. So the Cambridge example is officially MA 2-US 3-MA 3A-MA 16. This also makes the SE Expressway north of Neponset to Storrow Drive officially I-93-US 1-MA 1A-MA 3-MA 3A. I guess that this also means that I-95 between Exits 12 and 15 officially is I-95-US 1-MA 1A-MA 128.

[PHLBOS]

Technically, MA routes 1A and 3A run concurrently with their parent routes between their sections north and south of Boston. So the Cambridge example is officially MA 2-US 3-MA 3A-MA 16. This also makes the SE Expressway north of Neponset to Storrow Drive officially I-93-US 1-MA 1A-MA 3-MA 3A. I guess that this also means that I-95 between Exits 12 and 15 officially is I-95-US 1-MA 1A-MA 128.

One flaw with that thought/approach.  Since the Big Dig entrance/exit ramp reconfigurations from a decade ago, someone heading southbound on MA 1A via the Sumner Tunnel can not directly get on the southbound O'Neill Tunnel (I-93/US 1 South).  Conversely, there is no longer direct access from the northbound O'Neill Tunnel (I-93/US 1) to the Callahan Tunnel (MA 1A North) and the only 1A NORTH signs one sees while heading eastbound in the Ted Williams Tunnel (I-90) isn't until they're approaching the exit for Logan Airport (Exit 26).

The only signed designated parent-alternate duoplexes in MA I'm aware of are US 1/MA 1A between Newburyport and Salisbury and MA 2/MA 2A between Lincoln and Acton.

[NE2]

http://www.shorpy.com/files/images/SHORPY_8b29416a.jpg

That link goes to Route 404, by the way (unless my work firewall is blocking it, and I don't see the usual net nanny message).

It's a hotlinking thing. Add a space after the URL and hit enter.

[The High Plains Traveler]

http://www.shorpy.com/files/images/SHORPY_8b29416a.jpg

That link goes to Route 404, by the way (unless my work firewall is blocking it, and I don't see the usual net nanny message).

It's a hotlinking thing. Add a space after the URL and hit enter.

I should've just copy/pasted. That photo is probably along Washington Ave. in downtown Minneapoiis, west of where 56 angled off. Mmmm. I think I'll have a Gluek after I get home.

[djsinco]

That is some nice resolution. That car looks like an XXXL HHR!

[PHLBOS]

That car looks like an XXXL HHR!

You actually have that backwards, the HHR's was trying to look like vehicles of the era that photo was taken.

[Billy F 1988]

Montana multiplexes (mainly based on concurrency):

I-90/US 93/MT 200 (through most of Missoula County)

I-90/US 212/US 310 (near Laurel, Montana west of Billings)

I-115/I-15/90 Business (the spur route into downtown Butte)

I-15/US 12/US 287 (Townsend and Capitol near Helena)

I-15 Business/US 89/MT 200/MT 3 (the I-315 overlap)

I-94/US 12 (formerly a multiplex with US 10/US 12/US 312, now MT 59)

US 87/MT 19/MT 200 (in Fergus County by Grass Range)

MT 2/US 212

MT 3/US 12 (in Golden Valley County)

MT 3/US 12/US 191 (in Wheatland County)

MT 3/MT 200/US 87/US 191 (in Fergus County near Moore, Montana)

MT 16/MT 23/MT 200 (in Richland County south of Sidney)

[formulanone]

Bump...Found another "Georgia Seven" in Hawkinsville the other day. It doesn't last long, perhaps just a half mile:



(Photo from January 2014.)

[TEG24601]

I was always partial to the 4-plex of US-421, SR-39, SR-25, SR-18 through downtown Delphi, IN.  Beyond that, there are nearly 9 miles of 421/39/18 on either side.

[hotdogPi]

Here are some that have 4:

US 4 / NH 9 / NH 107 / US 202
US 6 / US 7 / I-84 / US 202      (CT)
NY13 / NY 34 / NY 79 / NY 96
ME 4 / ME 11 / ME 100 / US 202
ME 11 / ME 100 / ME 135 / US 202
ME 11 / ME 17 / ME 100 / US 202
ME 17 / ME 100 / US 201 / US 202
ME 8 / ME 11 / ME 27 / ME 104
ME 3 / ME 9 / ME 32 / US 202
US 1A / US 6 / US 44 / I-195    (RI)

Maine loves multiplexes.
US 202 also loves multiplexes.

Yes, I know some of these have already been mentioned.

[achilles765]

I know this is old but I just had to mention one here in Texas: in Beaumont there's a stretch that carries Interstate 10/US 90/US 69/US 96/US 287.

[US20IL64]

US 12/20/45 in Cook County/Chicagoland. We just call it Mannheim or LaGrange Rd.

[US 89]

I feel like we've had a thread on this since 2014...

Either way, Georgia has some huge ones. There is an 8-way concurrency on the southeastern leg of the Athens Perimeter - including GA 10 Loop, US 29, US 78, US 129, US 441, GA 8, GA 15, and unsigned GA 422.

[SkyPesos]

I feel like we've had a thread on this since 2014...

That's because the last post here before a big thread bump was in 2014.