I just thought about how in Sikeston, MO, US 61 intersects with both US 60 and US 62. In addition, US 60 intersects MO 59 near Neosho.
Throughout the country, what other roads are there that, within a given state, intersect both with a road of the preceding number (that is to say, the number minus one), as well as the following number (the number plus one)? In other words: If x is the number of a road, what roads intersect with roads numbered x-1 *and* x+1 within the same state?
New Hampshire has 9-10-11-12, plus 8 and 13 if you cross into Vermont and Massachusetts, respectively (9 and 12 keep their numbers across state lines).
Indiana:
IN 13-IN 14-IN 15-IN 16-IN 17
IN 18-IN 19-US 20
IN 26-US 27-IN 28-IN 29
US 30-US 31-IN 32
US 35-US 36-IN 37-IN 38-IN 39-US 40-US 41
Quote from: cabiness42 on January 30, 2022, 10:08:22 PM
Indiana:
IN 13-IN 14-IN 15-IN 16-IN 17
IN 18-IN 19-US 20
IN 26-US 27-IN 28-IN 29
US 30-US 31-IN 32
US 35-US 36-IN 37-IN 38-IN 39-US 40-US 41
Two more Indiana ones:
- SR 58 intersects SR 57 and SR 59
- SR 65 intersects SR 66 and SR 64 (plus I-64 as a bonus)
Nevada clusters similar state highway numbers. It looks like there are three examples:
1. In Lovelock, SR 398 intersects both SR 397 and SR 399 (and SR 396 too).
2. Along Pyramid Lake north of Reno, SR 446 connects SR 445 to the west and SR 447 to the east.
3. In the Smith Valley, SR 824's northwest terminus is at SR 823, and SR 825 is a short spur road off of SR 824.
There are some other close ones which don't quite qualify; for example in the Mt. Charleston area outside Las Vegas, SR 158 is the connector between SR 156 and SR 157.
I-80 intersects I-79 and I-81 in Pennsylvania
Quote from: ran4sh on January 31, 2022, 02:21:57 AM
I-80 intersects I-79 and I-81 in Pennsylvania
There's also US 30, which intersects the southern PA 29's southern terminus in Chester County, and PA 31's eastern terminus in Bedford County.
In addition, PA 75 meets PA 74's northern terminus in Juniata County, and intersects I-76 (PA Turnpike) at the Turnpike's Willow Hill interchange in Franklin County.
Ontario:
- 6
- 7
- 401
I'm not sure if there's any for Secondary Highways.
Quote from: ran4sh on January 31, 2022, 02:21:57 AM
I-80 intersects I-79 and I-81 in Pennsylvania
In the next year or two, I-70 will be the second interstate to intersect both the preceding and following interstate numbers, with I-69 meeting it via I-465.
In Ohio, US 23 intersects both US 22 and US 24.
In Colorado:
US24->I-25->CO26
US85->CO86->US87->CO88
Specifically, CO86 intersects US85 and US87 at the same time.
In Utah:
SR 90 intersects US 89 and US 91 east of Brigham City (and in the same place, since 89/91 are concurrent through there)
SR 172 intersects SR 171 and SR 173 three miles apart in West Valley
In Connecticut:
30 - 31 - 32 (not an original cluster. 32 was there first as a NE interstate; then 31 replaced old US 6; then 30 replaced old CT 15)
70 - 71 - 72
79 - 80 - 81 (from 1932)
In Wisconsin, a state without a grid of any sort, WI-22 intersects with both WI-21 in Wautoma and WI-23 in Montello. About 20 miles apart.
US 5, US 6, US 7, CT 8, CT 9, and CT 10 in Connecticut. Is that the record?
Quote from: BlueOutback7 on January 31, 2022, 11:57:45 AM
US 5, US 6, US 7, and CT 8 in Connecticut.
US 7 never touches CT 8 or its extension in MA or VT.
Alaska:
AK1->AK2->AK3
Quote from: 1 on January 31, 2022, 12:00:05 PM
Quote from: BlueOutback7 on January 31, 2022, 11:57:45 AM
US 5, US 6, US 7, and CT 8 in Connecticut.
US 7 never touches CT 8 or its extension in MA or VT.
Oops, I guess I missed that. Also, there's MA 2, US 3, and MA 4 in Massachusetts.
It appears Virginia has just one current example: VA 2
North Carolina: NC 96
South Carolina: don't see one
There are some close calls in California, but I think the closest it gets is CA-79, which intersects CA-78, and terminates at historical US-80.
Rhode Island, RI 115, RI 116, RI 117
Maine, ME 15, ME 16, ME 17
I don't think Vermont has one, the closest I found was VT 3, US 4, and US 5, but VT 3 ends at US 4 Business, which doesn't come near US 5. Actually, it used to count because Business 4 used to be the mainline US 4.
Historic example in Kentucky. Before KY 35 south of its current terminus became US 127, KY 34 intersected both KY 33 and KY 35 in downtown Danville.
Quote from: hbelkins on January 31, 2022, 10:28:47 AM
In Ohio, US 23 intersects both US 22 and US 24.
and before the de-commissioning of US-21 and US-25 in Ohio, there were also
20-21-22
23-24-25
with the way Ohio clusters state routes, I have to assume there are several examples;
two I can think of off the top of my head are OH-126-US-127-OH-128 and US-127-OH-128-OH-129
MN
US 14: MN 13 and MN 15
MN 28: MN 27 and MN 29 (27-28-29 is an intersection chain)
WI-32 intersects WI-31 and WI-33
WI-64 intersects US-63 and WI-65
US-12 intersects WI-11 and WI-13, which is weird to think about
WA 19 intersects WA 20, which intersects WA 21 a fair distance later.
Off the top of my head in IL:
US 51 intersects both US 50 and US 52
US 52 intersects both US 51 and IL 53
Historic MN examples:
MN 15: US 14 and former US 16
MN 55: former MN 54 and the former northern extent of MN 56
Other current examples
MN 60: US 59 and US 61
MN 95: I-94 and MN 96
Hmmmm...Since Illinois has various clusters of similarly-numbered routes close together, there has to be at least something. What immediately comes to my mind is IL-146 intersecting IL-147, then IL-145. IL-116 intersects IL-115 and IL-117.
US 6 crosses IL 5 in Moline and meets IL 7 in a "bump" intersection in Orland Park, and IL 7's southern terminus is also at US 6 in Joliet
I'm sure there are others in the state, but the first one that comes to mind is OK-3 intersecting OK-1, OK-2, and OK-4.
Quote from: 7/8 on January 31, 2022, 10:19:37 AM
Ontario:
- 6
- 7
- 401
I'm not sure if there's any for Secondary Highways.
If you take the route of the King's Highways before downloading, you will find that Hwy 6 intersected both Highway 5 and 7. Highway 7 intersected Highway 6 and 8. Highway 10 intersected Highway 9 and 11.
What's the longest chain? I know 1-2-3-4-5-6-7 is possible with US routes, but it's not in a single state.
Vermont currently has one example: VT 15 intersects both VT 14 and VT 16. Historically, US 4 intersected with both VT 3 and US 5, but VT 3 and US 4 no longer meet, due to US 4 moving to its new freeway alignment. The old alignment is now US 4 Business.
QC-202 intersects both QC-201 and QC-203.
Quote from: andrepoiy on February 01, 2022, 09:06:12 PM
Quote from: 7/8 on January 31, 2022, 10:19:37 AM
Ontario:
- 6
- 7
- 401
I'm not sure if there's any for Secondary Highways.
If you take the route of the King's Highways before downloading, you will find that Hwy 6 intersected both Highway 5 and 7. Highway 7 intersected Highway 6 and 8. Highway 10 intersected Highway 9 and 11.
I'm confused. Your first two examples still exist today (hence why I listed them in my post). Also, as far as I know, Highways 10 and 11 didn't intersect even before the downloads.
Quote from: 7/8 on February 01, 2022, 10:16:44 PM
Quote from: andrepoiy on February 01, 2022, 09:06:12 PM
Quote from: 7/8 on January 31, 2022, 10:19:37 AM
Ontario:
- 6
- 7
- 401
I'm not sure if there's any for Secondary Highways.
If you take the route of the King's Highways before downloading, you will find that Hwy 6 intersected both Highway 5 and 7. Highway 7 intersected Highway 6 and 8. Highway 10 intersected Highway 9 and 11.
I'm confused. Your first two examples still exist today (hence why I listed them in my post). Also, as far as I know, Highways 10 and 11 didn't intersect even before the downloads.
Whoops
So I meant that Highway 9 intersected both Highway 10 and Highway 11, but no Hwy 10 and 11 did not intersect
The only California one of which I am aware:
US 50 intersects (unsigned) CA 51 and CA 49.
Quote from: JayhawkCO on January 31, 2022, 10:36:49 AM
In Colorado:
US24->I-25->CO26
US85->CO86->US87->CO88
Specifically, CO86 intersects US85 and US87 at the same time.
dangit you beat me to it! i was too busy looking up to see if alameda ave intersected 25.
the 85-88 one, never occurred to me.
well played.
Quote from: SkyPesos on January 31, 2022, 10:22:31 AM
Quote from: ran4sh on January 31, 2022, 02:21:57 AM
I-80 intersects I-79 and I-81 in Pennsylvania
In the next year or two, I-70 will be the second interstate to intersect both the preceding and following interstate numbers, with I-69 meeting it via I-465.
And if I-73 got built I-71 would qualify in Columbus.
Not mentioned before but all New England US routes above 1 and less than 7 if you want to qualify it as a state itself. Being sarcastic in a funny way.
MD 5, MD 4 and MD 6
FL 519 (Fiske Blvd) connects with FL 520 (King Street) in Cocoa.
Quote from: DeaconG on February 03, 2022, 08:28:33 AM
FL 519 (Fiske Blvd) connects with FL 520 (King Street) in Cocoa.
https://www.youtube.com/watch?v=xOrgLj9lOwk
"Three shall be the number thou shalt count"
MA 128 meets MA 127 in Gloucester and MA 129 in Wakefield.
Three seems to be common enough that I was looking for chains of 4 or more, which is why my first post in this thread was a chain of 4.
Quote from: 1 on February 03, 2022, 08:44:40 AM
Three seems to be common enough that I was looking for chains of 4 or more, which is why my first post in this thread was a chain of 4.
Ontario Highway 401 intersects the 400, 402, 403, and 404 (a chain of 5!)
Quote from: 7/8 on February 03, 2022, 09:07:58 AM
Quote from: 1 on February 03, 2022, 08:44:40 AM
Three seems to be common enough that I was looking for chains of 4 or more, which is why my first post in this thread was a chain of 4.
Ontario Highway 401 intersects the 400, 402, 403, and 404 (a chain of 5!)
402 doesn't touch 403.
Quote from: SkyPesos on January 31, 2022, 10:22:31 AM
Quote from: ran4sh on January 31, 2022, 02:21:57 AM
I-80 intersects I-79 and I-81 in Pennsylvania
In the next year or two, I-70 will be the second interstate to intersect both the preceding and following interstate numbers, with I-69 meeting it via I-465.
Huh? I-70 intersects I-71 in Ohio. The intersection with I-69 will be in Indiana.
In NJ, NJ-35 touches the southern terminus of NJ-34 and the western terminus of NJ-36
In the way too strange category: I-74 in North Carolina intersects with NC-71, NC-72 and NC-73. I-74 also intersects (and runs concurrent) with I-73, and also intersects (and runs concurrent) with US-74. And on the flip side (but doesn't quite qualify), I-73 in North Carolina intersects (and runs concurrent) with I-74 and also intersects NC-73 and US-74.
How about a skip stop approach? I-74 in North Carolina intersects with NC-62, US-64, NC-66, NC-68, US-70, NC-72, US-74 and US-76.
Quote from: Dirt Roads on February 04, 2022, 11:49:42 AM
In the way too strange category: I-74 in North Carolina intersects with NC-71, NC-72 and NC-73. I-74 also intersects (and runs concurrent) with I-73, and also intersects (and runs concurrent) with US-74. And on the flip side (but doesn't quite qualify), I-73 in North Carolina intersects (and runs concurrent) with I-74 and also intersects NC-73 and US-74.
How about a skip stop approach? I-74 in North Carolina intersects with NC-62, US-64, NC-66, NC-68, US-70, NC-72, US-74 and US-76.
That's not how chaining works. You want 71 to intersect 72, 72 to intersect 73, and 73 to intersect 74. For skip stopping, N+2 should intersect N.
People need to pay more attention to the word "both" in the thread's title. We're talking about highway x intersecting highway x-1 and highway x+1. That's it.
Three seems too common, though. That's why I was looking for four or more.
NH 106-107-108
RI 115-116-117
MA 19-20-21 (yes, I know that's US 20)
VT 14-15-16
I know it's not four, but what's the highest numbered pair that you can find? I've found FL 817 intersecting FL 816 in Sunrise and FL 818 in Davie. Is there any other pair that's higher?
Here's another one in North Carolina: NC-96 is multiplexed at the Four Oaks interchange with I-95 (Exit 90//US-301/US-701/NC-96), and also intersects NC-97.
Quote from: hbelkins on February 03, 2022, 01:38:51 PM
Quote from: SkyPesos on January 31, 2022, 10:22:31 AM
Quote from: ran4sh on January 31, 2022, 02:21:57 AM
I-80 intersects I-79 and I-81 in Pennsylvania
In the next year or two, I-70 will be the second interstate to intersect both the preceding and following interstate numbers, with I-69 meeting it via I-465.
Huh? I-70 intersects I-71 in Ohio. The intersection with I-69 will be in Indiana.
Forgot about the "within a state" in the title for this one, only thinking about roads nationwide under the same quality (interstate-interstate in this case) here.
There's a third one that could fit under this: I-74 meets both I-73 (in NC) and I-75 (in OH).
^ Except I-74 isn't and likely never will be one road. It's arguably just as much a duplicate as I-86, I-84, I-88, I-76, and I-87.
Quote from: BlueOutback7 on February 04, 2022, 12:09:13 PM
I know it's not four, but what's the highest numbered pair that you can find? I've found FL 817 intersecting FL 816 in Sunrise and FL 818 in Davie. Is there any other pair that's higher?
NV 823 --> NV 824 --> NV 825 in Lyon County.
(https://i.imgur.com/sQuqSSz.jpg)