Highest Consecutive Numbered Interchange, Junction, and Intersection

[kurumi]

CT consecutive intersections:
...
CT 173 and CT 174
CT 182/182A and CT 183
...

ConnDOT: "See? Nobody cares about CT 176!"

[Dirt Roads]

The only two I know of in West Virginia are consecutively numbered:

Intersection of WV-32 and US-33 in Harman
Interchange with WV-34 from US-35 between Teays Valley and Winfield

And of course, the latter has moved twice since my days there.  Before the Silver Bridge disaster, WV-34 met US-35 on the north end of the Winfield Toll Bridge with a short concurrency to Red House.  After the relocation, WV-34 met US-35 on the south end of Winfield Toll Bridge with a bit longer concurrency to the Winfield Locks and Dam.  Locals still call it the Winfield Toll Bridge, but there was an uproar when the WVDOH used that term during the rehabilitation of the bridge that was completed in 2010.  The public still needed to be assured that the tolls were gone for good.  At the other end, the locks have since been relocated inland, so the term "locks and dam" is also old-fashioned.

[JayhawkCO]

New Mexico has NM501 and NM502 that intersect in Los Alamos.

Chris

[kphoger]

Excuse the double post, but I actually came across this case some time ago. KY 3396 and KY 3397 northwest of Louisa. I don't know if there's one higher than this but I came across this one coincidentally a long time ago.

So far, I believe that's the winner.

Sum = 6793

[michravera]

Excuse the double post, but I actually came across this case some time ago. KY 3396 and KY 3397 northwest of Louisa. I don't know if there's one higher than this but I came across this one coincidentally a long time ago.

So far, I believe that's the winner.

Sum = 6793

There must be at least 3 winners and I can make a case for there being as many as 192. However, it may be difficult to find a numbered street to numbered street interchange with consecutive numbers. Sacramento, for instance, has quite a few Numbered Street/Numbered Avenue *intersections* with consecutive numbers in the "South Area", but I am personally aware of *ANY* interchanges.

I personally don't, for instance, know of any "2nd Street" or "2nd Avenue" interchanges, junctions, or intersections with CASR-1. If such there be, my guess is that they would be in Long Beach.

[paulthemapguy]

Here's a visual aid for the highest pair of consecutive routes in Illinois to intersect.  It's a very close-up photo, because I took this when I was 15.

To be clear, we're talking about numbers a and b such that a+1=b, and a (or b) is maximized...right?


IL-161-160 by Paul Drives, on Flickr

[JayhawkCO]

To be clear, we're talking about numbers a and b such that a+1=b, and a (or b) is maximized...right?

Correct.

Chris

[paulthemapguy]

Here's a photo display of many of the (x,x+1) junctions in Illinois (click links for full views):

Not pictured:

• US51 at US52 in Mendota (US51 is duplexed with I-39)
• US50 at US51 in Sandoval (Haven't been there)
• IL-54 at I-55 in Springfield
• IL-58 at IL-59 (couldn't find a photo with the 59 marker in it)

IL-US6-007ENA by Paul Drives          IL-017-018W by Paul Drives             IL-021-022S by Paul Drives


IL-031-US30NSA by Paul Drives           IL-033-I-57WS by Paul Drives           IL-053-US6SN by Paul Drives


IL-073-072S by Paul Drives              IL-081-082WE by Paul Drives            IL-090-091WE by Paul Drives


IL-106-US54EE by Paul Drives           IL-115-116N by Paul Drives             IL-116-117EW by Paul Drives


IL-123-124E by Paul Drives              IL-132ET by Paul Drives                    IL-145-146N by Paul Drives


IL-146-147N by Paul Drives              IL-149-148W by Paul Drives             IL-154-153E by Paul Drives


IL-159-158N by Paul Drives              IL-161-160 by Paul Drives

Note that IL-107 doesn't quite meet IL-106, but if you continue south on US54, you meet IL-106 in Pittsfield.

[SEWIGuy]

I believe this is the highest in Wisconsin.

https://www.google.com/maps/@44.3862489,-91.0006864,3a,75y,307.01h,81.46t/data=!3m6!1e1!3m4!1sUUf6V7ui0Aip1JwxkzDQJQ!2e0!7i16384!8i8192

I-94+WI-95 = 189

[hbelkins]

Fun fact about those 3000-series Kentucky routes -- back in the 1980s, the state took over a bunch of roads that were formerly maintained by the respective counties. The routes tend to be clustered by county, with larger clusters by districts. My county has KY 3330, 3331, and 3332. That results in some occasions where they intersect, such as the Menifee County example I named and the Lawrence County example that was posted via Street View.

[thspfc]

I believe this is the highest in Wisconsin.

https://www.google.com/maps/@44.3862489,-91.0006864,3a,75y,307.01h,81.46t/data=!3m6!1e1!3m4!1sUUf6V7ui0Aip1JwxkzDQJQ!2e0!7i16384!8i8192

I-94+WI-95 = 189

Forgot about that one.

[US 89]

Utah’s current full list:

SR 24/SR 25 near Fish Lake
SR 43/SR 44 in Manila
SR 65/SR 66 near East Canyon Reservoir
SR 83/I-84 in Howell
US 89/SR 90/US 91 in Brigham City
SR 99/SR 100 in Fillmore
SR 105/SR 106 in Centerville
SR 118/SR 119 in Richfield
SR 123/SR 124 in East Carbon
(SR 162/US 163 in Bluff - UDOT documentation still has 163 going all the way to I-70 on a 191 concurrency)
SR 171/SR 172 in West Valley City
SR 172/SR 173 in West Valley City
SR 201/SR 202 near Magna
SR 209/SR 210 at Little Cottonwood Canyon
SR 269/SR 270 in Salt Lake City

[Rothman]

Fun fact about those 3000-series Kentucky routes -- back in the 1980s, the state took over a bunch of roads that were formerly maintained by the respective counties. The routes tend to be clustered by county, with larger clusters by districts. My county has KY 3330, 3331, and 3332. That results in some occasions where they intersect, such as the Menifee County example I named and the Lawrence County example that was posted via Street View.

I thought they were also connector roads or temporary designations as well.

[zachary_amaryllis]

For Colorado, near miss of CO370 and CO371 which are in the same "cluster" but don't actually intersect.  (CO368 and CO370 do, but one away).

For the 2-way winner, it's US87 (unsigned) and CO88 which are concurrent through Centennial.

For a 3-way intersection like US 89's above: US85/CO86/US87 (unsigned) in Castle Rock.

For state highways only, it used to be CO73 and CO74 meeting in Evergreen before CO73 was decommissioned.  Now there are none.

Chris

They need to somehow extend Kipling Street into Windsor then 391 and 392 would intersect

[TheHighwayMan3561]

Since we started doing full lists:

MN:

TH 9/US 10 east of Moorhead
TH 13/US 14 in Waseca
US 14/TH 15 in New Ulm
TH 19/TH 20 in Cannon Falls
TH 22/TH 23 in Richmond
TH 27/TH 28 near Browns Valley and again near/in Little Falls
TH 28/TH 29 in Glenwood
I-35W/TH 36 in Roseville
TH 43/TH 44 in Mabel
TH 51/US 52 in St. Paul
TH 54/TH 55 in Elbow Lake
US 59/TH 60 in Worthington
TH 60/US 61 in Wabasha
TH 67/TH 68 in Morgan
US 71/TH 72 in Blackduck
I-90/TH 91 near Adrian
I-94/TH 95 in Afton
TH 95/TH 96 north of Stillwater
TH 298/TH 299 in Faribault