I was trying to figure out which Interstate, and which US highway holds the title of being the endpoint for most of its peers. For example, which Interstate terminates the most other interstates, same question with US routes?
For this exercise, let's not count 3-dis.
I think I-10 might be a front runner, it ends 10 other Interstates. It is an endpoint for:
I-17
I-8
I-19
I-25
I-20
I-49
I-12
I-55
I-59
I-65
Haven't delved too much into US routes yet, as there's way more.
I-95 has surprisingly few despite passing through so many populated areas. It only has six. I-4, I-10, I-20, I-85, I-80, and I-91 unless I'm missing any. I-83, I-84, and I-70 would've ended there if not for the cancellations and I-90 used to end at I-95 before it was extended into Boston.
Quote from: BlueOutback7 on May 23, 2023, 11:55:17 AM
I-95 has surprisingly few despite passing through so many populated areas. It only has six. I-4, I-10, I-20, I-85, I-80, and I-91 unless I'm missing any. I-83, I-84, and I-70 would've ended there if not for the cancellations and I-90 used to end at I-95 before it was extended into Boston.
I-90 might be the next up, with 7.
82
94
25
65
77
86
84
Quote from: BlueOutback7 on May 23, 2023, 11:55:17 AM
I-95 has surprisingly few despite passing through so many populated areas. It only has six. I-4, I-10, I-20, I-85, I-80, and I-91 unless I'm missing any. I-83, I-84, and I-70 would've ended there if not for the cancellations and I-90 used to end at I-95 before it was extended into Boston.
I think you're missing I-93, so that would be 7.
Quote from: OCGuy81 on May 23, 2023, 12:18:47 PM
Quote from: BlueOutback7 on May 23, 2023, 11:55:17 AM
I-95 has surprisingly few despite passing through so many populated areas. It only has six. I-4, I-10, I-20, I-85, I-80, and I-91 unless I'm missing any. I-83, I-84, and I-70 would've ended there if not for the cancellations and I-90 used to end at I-95 before it was extended into Boston.
I-90 might be the next up, with 7.
82
94
25
65
77
86
84
A lot here depends on how technical we're being. I-65, for example, continues a small smidge past the I-90 ramps.
(https://i.imgur.com/j9dTUVn.png) (https://www.google.com/maps/@41.5958957,-87.3069007,688m/data=!3m1!1e3)
Quote from: CtrlAltDel on May 23, 2023, 12:50:55 PM
Quote from: OCGuy81 on May 23, 2023, 12:18:47 PM
Quote from: BlueOutback7 on May 23, 2023, 11:55:17 AM
I-95 has surprisingly few despite passing through so many populated areas. It only has six. I-4, I-10, I-20, I-85, I-80, and I-91 unless I'm missing any. I-83, I-84, and I-70 would've ended there if not for the cancellations and I-90 used to end at I-95 before it was extended into Boston.
I-90 might be the next up, with 7.
82
94
25
65
77
86
84
A lot here depends on how technical we're being. I-65, for example, continues a small smidge past the I-90 ramps.
(https://i.imgur.com/j9dTUVn.png) (https://www.google.com/maps/@41.5958957,-87.3069007,688m/data=!3m1!1e3)
Wow, you do raise a valid point.
I still tend to look at 65 terminating at 90, but hmmmm....I guess if we're being technical, that drops 90 down to 6.
Just for the x0s and x5s:
I-10 - (10/11) - I-8, I-12 (twice), I-17, I-19, I-20, I-25, I-49, I-55, I-59, I-65
I-20 - (1) - I-30
I-30 - (1) - I-45
I-40 - (6) - I-17, I-27, I-30, I-49 (currently), I-74 (currently), I-81
I-70 - (6) - I-29, I-44, I-64, I-68, I-76, I-99
I-80 - (4) - I-74, I-76, I-84, I-88
I-90 - (9) - I-25, I-43, I-71, I-77, I-82, I-84, I-86, I-88, I-94
I-5 - (1) - I-84
I-15 - (3) - I-40, I-70, I-86
I-25 - (0)
I-35 - (3) - I-14, I-29, I-37
I-45 - (0)
I-55 - (2) - I-39, I-57
I-65 - (3) - I-22, I-71, I-85
I-75 - (4) - I-16, I-24, I-74, I-96
I-85 - (0)
I-95 - (7) - I-4, I-10, I-20, I-80, I-85, I-91, I-93
I probably missed one or more somewhere, so let me know where.
Quote from: OCGuy81 on May 23, 2023, 12:55:13 PM
Wow, you do raise a valid point.
I still tend to look at 65 terminating at 90, but hmmmm....I guess if we're being technical, that drops 90 down to 6.
I count 8 without I-65.
Quote from: JayhawkCO on May 23, 2023, 01:08:45 PM
I-20 - (0)
I probably missed one somewhere, so let me know where.
I-30
Quote from: JayhawkCO on May 23, 2023, 01:08:45 PM
Just for the x0s and x5s:
I-10 - (10/11) - I-8, I-12 (twice), I-17, I-19, I-20, I-25, I-49, I-55, I-59, I-65
I-20 - (1) - I-30
I-30 - (1) - I-45
I-40 - (6) - I-17, I-27, I-30, I-49 (currently), I-74 (currently), I-81
I-70 - (6) - I-29, I-44, I-64, I-68, I-76, I-99
I-80 - (4) - I-74, I-76, I-84, I-88
I-90 - (8) - I-25, I-43, I-77, I-82, I-84, I-86, I-88, I-94
I-5 - (1) - I-84
I-15 - (3) - I-40, I-70, I-86
I-25 - (0)
I-35 - (3) - I-14, I-29, I-37
I-45 - (0)
I-55 - (2) - I-39, I-57
I-65 - (3) - I-22, I-71, I-85
I-75 - (4) - I-16, I-24, I-74, I-96
I-85 - (0)
I-95 - (7) - I-4, I-10, I-20, I-80, I-85, I-91, I-93
I probably missed one or more somewhere, so let me know where.
That's really interesting about I-5. Despite being the furthest west N-S mainline interstate, it only terminates one other interstate.
I'd forgotten that *technically* 90 continues just a bit west of I-5.
Quote from: OCGuy81 on May 23, 2023, 01:32:45 PM
Quote from: JayhawkCO on May 23, 2023, 01:08:45 PM
Just for the x0s and x5s:
I-10 - (10/11) - I-8, I-12 (twice), I-17, I-19, I-20, I-25, I-49, I-55, I-59, I-65
I-20 - (1) - I-30
I-30 - (1) - I-45
I-40 - (6) - I-17, I-27, I-30, I-49 (currently), I-74 (currently), I-81
I-70 - (6) - I-29, I-44, I-64, I-68, I-76, I-99
I-80 - (4) - I-74, I-76, I-84, I-88
I-90 - (8) - I-25, I-43, I-77, I-82, I-84, I-86, I-88, I-94
I-5 - (1) - I-84
I-15 - (3) - I-40, I-70, I-86
I-25 - (0)
I-35 - (3) - I-14, I-29, I-37
I-45 - (0)
I-55 - (2) - I-39, I-57
I-65 - (3) - I-22, I-71, I-85
I-75 - (4) - I-16, I-24, I-74, I-96
I-85 - (0)
I-95 - (7) - I-4, I-10, I-20, I-80, I-85, I-91, I-93
I probably missed one or more somewhere, so let me know where.
That's really interesting about I-5. Despite being the furthest west N-S mainline interstate, it only terminates one other interstate.
I'd forgotten that *technically* 90 continues just a bit west of I-5.
Yep. I-80 goes past it the most, but I-8, I-10, I-80, and I-90 all refuse to stop there, and I-15 doesn't quite get there.
Quote from: JayhawkCO on May 23, 2023, 01:08:45 PM
Just for the x0s and x5s:
I-10 - (10/11) - I-8, I-12 (twice), I-17, I-19, I-20, I-25, I-49, I-55, I-59, I-65
I-20 - (1) - I-30
I-30 - (1) - I-45
I-40 - (6) - I-17, I-27, I-30, I-49 (currently), I-74 (currently), I-81
I-70 - (6) - I-29, I-44, I-64, I-68, I-76, I-99
I-80 - (4) - I-74, I-76, I-84, I-88
I-90 - (8) - I-25, I-43, I-77, I-82, I-84, I-86, I-88, I-94
I-5 - (1) - I-84
I-15 - (3) - I-40, I-70, I-86
I-25 - (0)
I-35 - (3) - I-14, I-29, I-37
I-45 - (0)
I-55 - (2) - I-39, I-57
I-65 - (3) - I-22, I-71, I-85
I-75 - (4) - I-16, I-24, I-74, I-96
I-85 - (0)
I-95 - (7) - I-4, I-10, I-20, I-80, I-85, I-91, I-93
I probably missed one or more somewhere, so let me know where.
I-71 also ends at I-90 in Cleveland, so that's 9 for 90.
Quote from: zzcarp on May 23, 2023, 02:10:48 PM
I-71 also ends at I-90 in Cleveland, so that's 9 for 90.
Figured there was at least one more. Keep em comin'. Post edited.
Interstate Canadian Border. :bigass:
5, 15, 29, 69, 75, 81, 87, 89, 91, 94, 95
Quote from: TheHighwayMan394 on May 23, 2023, 02:43:10 PM
Interstate Canadian Border. :bigass:
5, 15, 29, 69, 75, 81, 87, 89, 91, 94, 95
If you're going to do that, might as well do Interstate Mexican Border too...
I-5, I-19, I-35, I-69W
The ten longest non-x0/5s:
I-29 - (0)
I-44 - (0)
I-49 - (0)
I-64 - (1) - I-71
I-69 - (0/1) - I-94 (kinda)
I-74 - (0)
I-77 - (2) - I-74 (currently), I-79
I-81 - (4) - I-66, I-78, I-84, I-88
I-94 - (2/3) I-41, I-57, I-69 (kinda)
Quote from: JayhawkCO on May 23, 2023, 03:03:29 PM
The ten longest non-x0/5s:
I-29 - (0)
I-44 - (0)
I-49 - (0)
I-64 - (1) - I-71
I-69 - (0/1) - I-94 (kinda)
I-74 - (0)
I-77 - (2) - I-74 (currently), I-79
I-81 - (4) - I-66, I-78, I-84, I-88
I-94 - (2/3) I-41, I-57, I-69 (kinda)
Does 94 technically terminate I-41 at the Illinois state line, or is US 41 the real killer?
Quote from: JayhawkCO on May 23, 2023, 02:47:55 PM
Quote from: TheHighwayMan394 on May 23, 2023, 02:43:10 PM
Interstate Canadian Border. :bigass:
5, 15, 29, 69, 75, 81, 87, 89, 91, 94, 95
If you're going to do that, might as well do Interstate Mexican Border too...
I-5, I-19, I-35, I-69W
I-69E too, IIRC.
Not quite. It technically ends at University Boulevard.
^In fact, I'm pretty sure I-5 is the only 2di to actually end at the border. I-19 stops a couple blocks short, as does I-35, and I believe I've read that I-69W technically ends at Riverbank Drive due to the World Trade Bridge being commercial only.
Does I-71 terminate at I-64 or I-65?
I would argue that it terminates at 64, since MM 0 is well east of Spaghetti Junction, and the decision point for eastbound I-64 traffic is beyond the I-65 underpass.
Quote from: OCGuy81 on May 23, 2023, 12:55:13 PM
I still tend to look at 65 terminating at 90, but hmmmm....I guess if we're being technical, that drops 90 down to 6.
I-65 terminates in an at-grade intersection with stoplights at US 12/20 (Dunes Hwy). It's signed all the way to that point. A block south of there is another at-grade turnoff into the Alliance Steel parking lot, complete with left turn lane on the northbound lane.
Quote from: JayhawkCO on May 23, 2023, 01:08:45 PM
Just for the x0s and x5s:
I-10 - (10/11) - I-8, I-12 (twice), I-17, I-19, I-20, I-25, I-49, I-55, I-59, I-65
I-20 - (1) - I-30
I-30 - (1) - I-45
I-40 - (6) - I-17, I-27, I-30, I-49 (currently), I-74 (currently), I-81
I-70 - (6) - I-29, I-44, I-64, I-68, I-76, I-99
I-80 - (4) - I-74, I-76, I-84, I-88
I-90 - (9) - I-25, I-43, I-71, I-77, I-82, I-84, I-86, I-88, I-94
I-5 - (1) - I-84
I-15 - (3) - I-40, I-70, I-86
I-25 - (0)
I-35 - (3) - I-14, I-29, I-37
I-45 - (0)
I-55 - (2) - I-39, I-57
I-65 - (3) - I-22, I-71, I-85
I-75 - (4) - I-16, I-24, I-74, I-96
I-85 - (0)
I-95 - (7) - I-4, I-10, I-20, I-80, I-85, I-91, I-93
I probably missed one or more somewhere, so let me know where.
What's noteworthy about I-85 is that it used to terminate I-40 in Death Valley before the latter was extended to Wilmington. And I-40 once terminated I-26 in Asheville prior to the continuation towards the Tri-Cities, and technically, it still does due to a future segment existing immediately north of town.
Quote from: vdeane on May 23, 2023, 08:51:43 PM
^In fact, I'm pretty sure I-5 is the only 2di to actually end at the border. I-19 stops a couple blocks short, as does I-35, and I believe I've read that I-69W technically ends at Riverbank Drive due to the World Trade Bridge being commercial only.
Probably accurate.
Nothing near the most, but in Indiana, US 20 terminates US 33, US 35 and I-65, which is a lot for anything not on a coast.
Quote from: vdeane on May 23, 2023, 08:51:43 PM
^In fact, I'm pretty sure I-5 is the only 2di to actually end at the border. I-19 stops a couple blocks short, as does I-35, and I believe I've read that I-69W technically ends at Riverbank Drive due to the World Trade Bridge being commercial only.
You forgot at least one major 2 di: I-69, which goes right up to the Blue Water Bridge (Port Huron/Sarnia) and ends at the Canadian border. Interstate 89 at Highgate, VT is likely another, as it is marked right up to the border. And then there's I-93 at Derby Line, VT which also ends at the border with Quebec.
Quote from: StogieGuy7 on May 25, 2023, 09:35:35 AM
Quote from: vdeane on May 23, 2023, 08:51:43 PM
^In fact, I'm pretty sure I-5 is the only 2di to actually end at the border. I-19 stops a couple blocks short, as does I-35, and I believe I've read that I-69W technically ends at Riverbank Drive due to the World Trade Bridge being commercial only.
You forgot at least one major 2 di: I-69, which goes right up to the Blue Water Bridge (Port Huron/Sarnia) and ends at the Canadian border. Interstate 89 at Highgate, VT is likely another, as it is marked right up to the border. And then there's I-93 at Derby Line, VT which also ends at the border with Quebec.
The discussion was about interstates terminating on the southern border.
Quote from: JayhawkCO on May 25, 2023, 09:45:54 AM
Quote from: StogieGuy7 on May 25, 2023, 09:35:35 AM
Quote from: vdeane on May 23, 2023, 08:51:43 PM
^In fact, I'm pretty sure I-5 is the only 2di to actually end at the border. I-19 stops a couple blocks short, as does I-35, and I believe I've read that I-69W technically ends at Riverbank Drive due to the World Trade Bridge being commercial only.
You forgot at least one major 2 di: I-69, which goes right up to the Blue Water Bridge (Port Huron/Sarnia) and ends at the Canadian border. Interstate 89 at Highgate, VT is likely another, as it is marked right up to the border. And then there's I-93 at Derby Line, VT which also ends at the border with Quebec.
The discussion was about interstates terminating on the southern border.
If you broaden the scope a bit to include 3dis, I-110 in El Paso reaches the border. I believe it is the only 3di to do so.
Quote from: JayhawkCO on May 25, 2023, 09:45:54 AM
Quote from: StogieGuy7 on May 25, 2023, 09:35:35 AM
Quote from: vdeane on May 23, 2023, 08:51:43 PM
^In fact, I'm pretty sure I-5 is the only 2di to actually end at the border. I-19 stops a couple blocks short, as does I-35, and I believe I've read that I-69W technically ends at Riverbank Drive due to the World Trade Bridge being commercial only.
You forgot at least one major 2 di: I-69, which goes right up to the Blue Water Bridge (Port Huron/Sarnia) and ends at the Canadian border. Interstate 89 at Highgate, VT is likely another, as it is marked right up to the border. And then there's I-93 at Derby Line, VT which also ends at the border with Quebec.
The discussion was about interstates terminating on the southern border.
Honestly, I didn't sift through the entire thread to glean that. And I wouldn't have guessed because the detail isn't all that important given that many interstates terminate right at the border and the engineering/administration of that interface is the same whether it's north or south.
Quote from: StogieGuy7 on May 25, 2023, 12:09:07 PM
Quote from: JayhawkCO on May 25, 2023, 09:45:54 AM
Quote from: StogieGuy7 on May 25, 2023, 09:35:35 AM
Quote from: vdeane on May 23, 2023, 08:51:43 PM
^In fact, I'm pretty sure I-5 is the only 2di to actually end at the border. I-19 stops a couple blocks short, as does I-35, and I believe I've read that I-69W technically ends at Riverbank Drive due to the World Trade Bridge being commercial only.
You forgot at least one major 2 di: I-69, which goes right up to the Blue Water Bridge (Port Huron/Sarnia) and ends at the Canadian border. Interstate 89 at Highgate, VT is likely another, as it is marked right up to the border. And then there's I-93 at Derby Line, VT which also ends at the border with Quebec.
The discussion was about interstates terminating on the southern border.
Honestly, I didn't sift through the entire thread to glean that. And I wouldn't have guessed because the detail isn't all that important given that many interstates terminate right at the border and the engineering/administration of that interface is the same whether it's north or south.
FYI, the ^ mark at the beginning of a post means that it is in reply to the one directly above it.
Lots of interstates (I-A1, I-5, I-15, I-29, I-75, I-94*, I-190, I-81, I-87, I-89, I-91, I-95) end at the Canadian border, which is why it's so weird that they tend to stop short of the Mexican border. Incidentally, I've even heard conflicting reports on exactly where I-110 ends, so that's why I limited that comment to 2dis.
*I tend to view I-69 here as a bootleg interstate. Unlike the infamous MMM I-80/90 discussion, they don't split again later, so it's a pointless overlap, and IIRC, I-94 was there first.