State with most US route concurrencies

[Revive 755]

An attempt for Illinois:

US 6:  US 34, US 52
US 12:  US 20, US 41, US 45
US 14:  None
US 20:  US 51, [US 12], [US 41], [US 45]
US 24:  US 45, US 136, US 150, US 52
US 30:  US 34
US 34:  [US 6], [US 30], US 67
US 36:  None
US 40:  US 45, US 51
US 41:  [US 12], [US 20]
US 45:  [US 12], [US 20], [US 40], US 52, US 150
US 50:  US 51
US 51:  [US 20], [US 40], [US 50], US 60, US 62
US 52:  [US 6], [US 45]
US 54:  None
US 60:  [US 51], [US 62]
US 62:  [US 51], [US 60]
US 67:  [US 34], US 136
US 136:  [US 67]
US 150:  [US 24], [US 45]

Partial list of former concurrencies:

US 34 and US 66 in Chicagoland
US 40, US 50, and US 66 in the St. Louis area
US 36, US 54, and US 66 in Springfield, with the US 36- US 54 concurrency stretching west towards Pittsfield
US 45, US 52, and US 54 around Kankakee?
US 51 and 52 around Mendota (prior to US 51 being upgraded into the freeway that became I-39)
US 51 and US 460 around Ashley

[TheHighwayMan3561]

MN has

2: 71, 75, 169
8: none
10: 12 (unsigned), 61, 75, 169
12: 10, 52 (both unsigned)
14: 52, 61, 63, 218
52: 63
59: 212
61: 63
71: 212

Former (partial, probably):
2: 61, 371
8: 61
16: 14, 61, 65, 71, 169, 218
169: 212

[TBKS1]

Let's see about Arkansas... many of these concurrencies may not be signed, Arkansas isn't that consistent with signing concurrencies.

US 49: 63 (Brand new, changed in late-2019), 64 (only for about 150 feet), 70 and 79
US 59: 70, 71, 270
US 61: 64, 70, 79, formerly shared a concurrency with US 63 until 2019
US 62: 63, 65, 67, 71, 412 (about 150 miles long)
US 63: 49 (for about 150 feet), 62, 64 (for about 150 feet), 65, 70, 79, 167
US 64: 49 and 63 (for about 150 feet), 67, 70, 71, 79, 167, also shares a concurrency with US 65 Business in Conway
US 65: 62, 63, 67, 79, 82, 165, 167, 278, 412
US 67: 62, 64, 65, 70, 71, 82, 167, 371, also shares a concurrency with US 270 Business in Malvern
US 70: 49, 59, 61, 64, 67, 63, 71, 79, 270
US 71: 59, 62, 64, 67, 70, 82
US 79: 61, 63, 64, 65, 70, 82, 167, 278
US 82: 65, 67, 71, 79, 278, 425
US 165: 65, 82, 278 (formerly shared a concurrency with US 63/79 in Stuttgart until like 8 years ago)
US 167: 63, 64, 65, 67, 79
US 270: 59, 70, 71
US 271: None but it's only in Arkansas for like 2 miles
US 278: 65, 70, 79, 165, 371 (twice)
US 371: 67, 278 (twice)
US 412: 62, 63, 65
US 425: 82

Hopefully I didn't miss any here.

[JayhawkCO]

Colorado: 

6 - 34, 40, 50, 85, 87 (5)
24 - 40, 87, 285, 287, 385 (5)
34 - 85 (1)
36 - 40, 287, 385 (3)
40 - 6, 24, 36, 287, 385 (5)
50 - 6, 85, 87, 285, 287, 385, 400 (7)
84 - None (0)
85 - 6, 34, 50, 87, 160 (5)
87 - 6, 24, 34, 50, 85, 160 (6)
138 - 385 (1)
160 - 85, 87, 285, 491, 550 (5)
285 - 24, 50, 160 (3)
287 - 24, 36, 40, 50, 385 (5)
350 - None (0)
385 - 24, 36, 40, 50, 138, 287 (6)
400 - 50 (1)
491 - 160 (1)
550 - 160 (1)

30 different concurrencies.

Chris

[Road Hog]

Let's see about Arkansas... many of these concurrencies may not be signed, Arkansas isn't that consistent with signing concurrencies.

US 49: 63 (Brand new, changed in late-2019), 64 (only for about 150 feet), 70 and 79
US 59: 70, 71, 270
US 61: 64, 70, 79, formerly shared a concurrency with US 63 until 2019
US 62: 63, 65, 67, 71, 412 (about 150 miles long)
US 63: 49 (for about 150 feet), 62, 64 (for about 150 feet), 65, 70, 79, 167
US 64: 49 and 63 (for about 150 feet), 67, 70, 71, 79, 167, also shares a concurrency with US 65 Business in Conway
US 65: 62, 63, 67, 79, 82, 165, 167, 278, 412
US 67: 62, 64, 65, 70, 71, 82, 167, 371, also shares a concurrency with US 270 Business in Malvern
US 70: 49, 59, 61, 64, 67, 63, 71, 79, 270
US 71: 59, 62, 64, 67, 70, 82
US 79: 61, 63, 64, 65, 70, 82, 167, 278
US 82: 65, 67, 71, 79, 278, 425
US 165: 65, 82, 278 (formerly shared a concurrency with US 63/79 in Stuttgart until like 8 years ago)
US 167: 63, 64, 65, 67, 79
US 270: 59, 70, 71
US 271: None but it's only in Arkansas for like 2 miles
US 278: 65, 70, 79, 165, 371 (twice)
US 371: 67, 278 (twice)
US 412: 62, 63, 65
US 425: 82

Hopefully I didn't miss any here.

Now do the ones that are signed in the field.

[Dirt Roads]

West Virginia (some of these overlap, so maybe the fewest?)

US-19/US-250 Fairmont
US-19/US-119 Morgantown (southbound only)
US-19/US-460 Princeton
US-33/US-119 Spencer -to- Weston
US-33/US-48/US-119 Weston -to- Buckhannon
US-33/US-48 Buckhannon -to- Harding
US-33/US-48/US-250 Harding -to- Elkins
US-33/US-219/US-250 Elkins
US-33/US-220 Franklin
US-48/US-219 Elkins -to- Kerens
US-50/US-220 Ridgeville -to- Junction
US-52/US-119 Nolan -to- Williamson
US-52/US-460 Bluefield
US-219/US-250 Elkins -to- Huttonsville

Fun fact:  US-60 no longer has any multiplexes with other US routes over its 172-mile trek across the state.  At various times, it has multiplexed with US-52 (Huntington), US-21 (Charleston -to- Chimney Corner, years 1926-1947), US-19 (Gauley Bridge -to Chimney Corner, years 1947-1977), US-19 (Road Fork Junction -to- Clifftop), and also with US-219 (Lewisburg).  Plus there was a perceived multiplex with US-35 northbound on Seventh Avenue in Charleston within the Iowa Street "Crazy Loop" for a very short time before the latter was relocated after the Silver Bridge collapse.  (That perceived multiplex still exists with WV-25).

[froggie]

MS
US 84- (US 61, US 425 [ew] [US 98??], I-59)
US 98- (I-55, I-59, [US 84??])

Historically, yes.  Currently, no.  Per MDOT, 98 ends at 84 in Bude, and has for over 20 years (they never did tell me when this was initially changed).


Since this topic got resurrected, I'll mention that although Vermont is a small state with only a few US routes (2, 4, 5, 7, and 302), with one exception all US route junctions in Vermont are concurrencies...and that one exception is only because 302 ends at 2.

[NWI_Irish96]

An attempt for Illinois:

US 6:  US 34, US 52
US 12:  US 20, US 41, US 45
US 14:  None
US 20:  US 51, [US 12], [US 41], [US 45]
US 24:  US 45, US 136, US 150, US 52
US 30:  US 34
US 34:  [US 6], [US 30], US 67
US 36:  None
US 40:  US 45, US 51
US 41:  [US 12], [US 20]
US 45:  [US 12], [US 20], [US 40], US 52, US 150
US 50:  US 51
US 51:  [US 20], [US 40], [US 50], US 60, US 62
US 52:  [US 6], [US 45]
US 54:  None
US 60:  [US 51], [US 62]
US 62:  [US 51], [US 60]
US 67:  [US 34], US 136
US 136:  [US 67]
US 150:  [US 24], [US 45]

Partial list of former concurrencies:

US 34 and US 66 in Chicagoland
US 40, US 50, and US 66 in the St. Louis area
US 36, US 54, and US 66 in Springfield, with the US 36- US 54 concurrency stretching west towards Pittsfield
US 45, US 52, and US 54 around Kankakee?
US 51 and 52 around Mendota (prior to US 51 being upgraded into the freeway that became I-39)
US 51 and US 460 around Ashley

I believe there was a 6-66 concurrency in Joliet.