Highest Consecutive Numbered Interchange, Junction, and Intersection

[michravera]

In some areas, it's normal numbering for, for instance, Highway 22 to break apart into Highways 220 and 221. This counts, but is sort of like saying that The Holy See and Italy have the closest capitals. It's a little chicken. I'm interested in that too, but more interested in intersections, interchanges, or junctions between consecutively numbered roads of the same or different types with the highest numbers. Let's start with CASR-1 and CASR-2 which intersect or junction in Santa Monica. Now, I know you can beat that!

I'd love to hear about near misses of consecutive high numbered roads and high numbered roads that only just miss being consecutive.

[oscar]

Hawaii has 377 and 378 intersecting on Maui, downhill from Haleakala National Park. This is not surprising, with how Hawaii clusters routes by island, including all 3x, 3xxx, and 3xxx routes on Maui island. 377 is a loop from main route 37. 378 is a spur (to the national park) from 377.

Hawaii's Lanai island has 440 and its tiny 441 spur, at least on paper.

The routes in Alaska, and Canada's Arctic territories, don't even get out of two-digit numbers. In Alaska, highest-numbered intersection of consecutive routes is 2 and 3 in Fairbanks. In the Yukon, it's 7 and 8. In the Northwest Territories, 5 and 6.

[US 89]

As noted above, this is going to be easier in states that cluster route numbers. The highest current one in Utah is the junction of SR 269 and SR 270 in downtown Salt Lake City, at the intersections between West Temple and the 500/600 South one-way pair.

Historically, an even greater example occurred in Farmington, where SR 272 and SR 273 ended at each other at US 89. But those two routes were combined as SR 273 in 2001, leaving 269/270 as the winner.

As far as close calls go: SR 275 and 276 both end at SR 95 less than 8 miles apart in the middle of the vast emptiness of southeastern Utah. SR 271 and 274 intersect in Parowan. And SR 278 was legally defined to intersect SR 279 southwest of Moab, but 278 was never built and was eventually deleted by the legislature.

If you're interested in junctions of three consecutive route numbers, US 89/SR 90/US 91 all meet up at an interchange east of Brigham City.

[GaryV]

There was a junction between M-553 and former M-554.  Alas, with the decommissioning of 554, that no longer counts.

[NWI_Irish96]

In Indiana, the highest consecutive pair that meet are IN 68 meeting both IN 69 and I-69.

Pretty soon, I-69 will meet I-70

[JayhawkCO]

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

[tigerwings]

Several in Ohio:

22 and 23 in Circleville.

24 and 25 in Maumee.

64 and 65 are concurrent east of Waterville.

70 and 71 in Columbus.

74 and 75 in Cincinnati.

76 and 77 in Akron.

77 and 78 in Caldwell.

109 and 110 are concurrent east of Napoleon.

116 and 117 are concurrent west of Spencerville.

118 and 119 intersect in St Henry.

122 and 123 in Red Lion.

189 and 190 are concurrent in Fort Jennings.

Sure there are several in missed

[kphoger]

I might have missed something, but...  I've checked Texas for everything above 2800 so far.  My brain hurts now, so I'm going to pause the search.

[deathtopumpkins]

Let's start with CASR-1 and CASR-2 which intersect or junction in Santa Monica.

Don't CA SR 1 and 2 no longer actually meet in Santa Monica though, since 2 was relinquished within the city?



Virginia SRs 171 and 172 intersect in Poquoson.

[SkyPesos]

Several in Ohio:

22 and 23 in Circleville.

24 and 25 in Maumee.

64 and 65 are concurrent east of Waterville.

70 and 71 in Columbus.

74 and 75 in Cincinnati.

76 and 77 in Akron.

77 and 78 in Caldwell.

109 and 110 are concurrent east of Napoleon.

116 and 117 are concurrent west of Spencerville.

118 and 119 intersect in St Henry.

122 and 123 in Red Lion.

189 and 190 are concurrent in Fort Jennings.

Sure there are several in missed

561 and 562 in Norwood is the highest in the state I can think of so far.

US 23, 24, 25 used to meet somewhere in the Toledo metro area. This used to be one of the very few 3 consecutive US routes that met until US 25 was decommissioned in Ohio.

I'm still looking through the 700s state routes to see if there's two consecutive route numbers that meet.

[JayhawkCO]

Wyoming has WYO431/WYO432 that meet in Worland, which must be one of the higher ones.

Chris

[formulanone]

For Alabama, SRs 215 and 216 meet in Tuscaloosa. There's far fewer even-numbered state routes once you get up to the 220s to 300 (where it picks up again with even numbers).

Consecutive route numbers with each with one or two digits are a little more common: 17+18, 21+22, 77+(US)78.

[hbelkins]

KY 3338 and KY 3339 in Menifee County.

There are probably others in Kentucky, but this is the closest one of which I am aware.

[thspfc]

WI-11 and US-12 in Elkhorn (grade separation)
US-12 and WI-13 in Wisconsin Dells
WI-21 and WI-22 in Wautoma
WI-22 and WI-23 in Montello
WI-31 and WI-32 in Wind Point
WI-32 and WI-33 in Port Washington
WI-42 and I-43 in Sheboygan and Manitowoc
WI-44 and US-45 in Oshkosh
US-51 and WI-52 in Wausau
US-53 and WI-54 Galesville
WI-54 and WI-55 in Seymour
WI-60 and US-61 in Boscobel
US-63 and WI-64 in Glenwood City
WI-64 and WI-65 in New Richmond
WI-80 and WI-81 in Platteville

So the highest intersection is WI-80 and WI-81. The highest interchange is US-51 and WI-52.

[kphoger]

I might have missed something, but...  I've checked Texas for everything above 2800 so far.  My brain hurts now, so I'm going to pause the search.

KY 3338 and KY 3339 in Menifee County.

There are probably others in Kentucky, but this is the closest one of which I am aware.

Part of the reason I stopped searching is that I knew Kentucky would probably beat anything I found in Texas.

[TBKS1]

Here's a few in Arkansas that I can think of...

AR 7 and AR 8 share a concurrency between Dalark and Arkadelphia
AR 8 and AR 9 share a concurrency through Princeton
AR 9 and AR 10 share a concurrency between Williams Jct. and Perry
AR 17 and AR 18 in Newport
AR 26 and AR 27 share a concurrency through Murfreesboro
AR 27 and AR 28 near Rover
AR 29 and I-30 at Hope
US 62 and US 63 share a concurrency between Imboden and Hardy
US 63 and US 64 in Fair Oaks (formerly West Memphis before the route changed)
US 64 and US 65 in Conway
US 65 and AR 66 near Leslie
US 70 and US 71 in De Queen
AR 78 and US 79 in Moro
AR 277 and US 278 west of Tillar
US 371 and AR 372 at Laneburg (probably the highest in Arkansas unless there's one I missed)

[TBKS1]

KY 3338 and KY 3339 in Menifee County.

There are probably others in Kentucky, but this is the closest one of which I am aware.

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.



[Google Street View]

[Bruce]

Washington's highest is SR 821 and SR 823 north of Selah, intersecting just before the former reaches I-82 (the parent route).

For Western Washington, it's probably SR 528 and SR 529 in Marysville. Coincidentally, the previous set of consecutive numbers (SR 526 and SR 527) intersect and terminate at each other within the Broadway Interchange in Everett.

[TBKS1]

LA 3002 and LA 3003 in Denham Springs, don't ask how I found this because idk how I found it either.



[Google Street View]

[TheHighwayMan3561]

MN is probably the intersection of MN 298 and MN 299 in Faribault. Both are short loops that serve state institutions and are on the kill list, so this could change down the line.

[michravera]

Let's start with CASR-1 and CASR-2 which intersect or junction in Santa Monica.

Don't CA SR 1 and 2 no longer actually meet in Santa Monica though, since 2 was relinquished within the city?



Virginia SRs 171 and 172 intersect in Poquoson.

I'm not sure, if you will see a sign for the junction of CASR-1 and CASR-2, but the Legislative definition that I saw on cahighways.org showed the two as having a common point. My objective in naming these two was to set an incredibly low bar. CASR-4 and I-5 definitely have an interchange in Stockton. I am sure that I can do better, for instance, don't CASR-90 and -91 have a junction? My goal was not to win the contest. I'm looking for the vast knowledge of the road community.

[1995hoo]

FL-817 (University Drive) and FL-818 (Griffin Road) in Davie. Not sure if there's a higher one nearby. At least in the Greater Miami area, there's some degree of clustering of route numbers.

[andrepoiy]

In Ontario, there's

Highway 400 and Highway 401

Highway 401 and Highway 402

I'm sure there is something intersection that larger in number (Ontario secondary highways), but I don't know them well enough to think of a junction.

[formulanone]

FL-817 (University Drive) and FL-818 (Griffin Road) in Davie. Not sure if there's a higher one nearby. At least in the Greater Miami area, there's some degree of clustering of route numbers.

FL 997 and fairly-new 998 in Homestead win that state, though there might be some four-digit county roads that meet elsewhere.

[jp the roadgeek]

CT consecutive intersections:

US 1 and CT 2
CT 2 and CT 3
US 5 and US 6 (1/4 interchange; US 6 is paired with I-84 here)
US 6 and US 7 (in a concurrency with I-84 and US 202)
CT 30 and CT 31
CT 31 and CT 32
CT 63 and CT 64
CT 68 and CT 69
CT 70 and CT 71
CT 71 and CT 72 (partial interchange)
CT 79 and CT 80
CT 80 and CT 81
CT 83 and I-84
CT 110 and CT 111
CT 153 and CT 154
CT 164 and CT 165
CT 173 and CT 174
CT 182/182A and CT 183
CT 190 and CT 191
CT 197 and CT 198

The highest consecutive signed CT route numbers are 319 and 320, which are about 10 miles apart or so.


For RI, there are 402 and 403 that cross each other without an interchange (which are the 2 highest signed routes).  The highest that do intersect are 122 and 123