Which Interstate/US Highway terminates the most of its peers?

[OCGuy81]

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.

[MATraveler128]

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.

[OCGuy81]

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

[zzcarp]

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.

[CtrlAltDel]

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.

[OCGuy81]

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.

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.

[JayhawkCO]

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.

[JayhawkCO]

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.

[hotdogPi]

I-20 - (0)

I probably missed one somewhere, so let me know where.

I-30

[JayhawkCO]

I-20 - (0)

I probably missed one somewhere, so let me know where.

I-30

Good call. Fixed.

[OCGuy81]

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.

[JayhawkCO]

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.

[zzcarp]

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.

[JayhawkCO]

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.

[TheHighwayMan3561]

Interstate Canadian Border.

5, 15, 29, 69, 75, 81, 87, 89, 91, 94, 95

[JayhawkCO]

Interstate Canadian Border.

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

[JayhawkCO]

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)

[OCGuy81]

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?

[OCGuy81]

Interstate Canadian Border.

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.

[JayhawkCO]

Not quite. It technically ends at University Boulevard.

[vdeane]

^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.

[hbelkins]

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.

[KeithE4Phx]

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.

[Henry]

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.

[JayhawkCO]

^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.