Longest combined length of interstate segments in two adjacent states

[KCRoadFan]

I-10 in Texas and Louisiana is 1,174 miles.
I-5 in California and Oregon is 1,105 miles.
I-70 in Colorado and Kansas is 874 miles.
I-40 in Tennessee and North Carolina is 865 miles.
I-75 in Florida and Georgia is 826 miles.

Throughout the country, aside from those in the preceding list, what are the interstate segments with the longest combined length in two adjacent states?

[Rothman]

Why?

[KCRoadFan]

Why?

Why do you have to act like that? The whole point of this forum is to ask any road-related questions one might have - this was one that came to mind for me. No need to criticize with a one-word troll post - if you don't have anything to contribute to a thread, you don't have to say anything.

[MATraveler128]

I-20 TX/LA - 825 miles

[TheHighwayMan3561]

I-80 (WY/NE) - 858 miles

[Hobart]

I-75 FL/GA - 824 miles

[Rothman]

Why?

Why do you have to act like that? The whole point of this forum is to ask any road-related questions one might have - this was one that came to mind for me. No need to criticize with a one-word troll post - if you don't have anything to contribute to a thread, you don't have to say anything.

I'm just not seeing the significance of the statistic.  Longest distance within a state, total distance in the country, sure.

But I'm not sure what a two-state total tells someone.

[KCRoadFan]

Why?

Why do you have to act like that? The whole point of this forum is to ask any road-related questions one might have - this was one that came to mind for me. No need to criticize with a one-word troll post - if you don't have anything to contribute to a thread, you don't have to say anything.

I'm just not seeing the significance of the statistic.  Longest distance within a state, total distance in the country, sure.

But I'm not sure what a two-state total tells someone.

Well, I was just curious about it. Is that not a good enough reason for you?

[Rothman]

Why?

Why do you have to act like that? The whole point of this forum is to ask any road-related questions one might have - this was one that came to mind for me. No need to criticize with a one-word troll post - if you don't have anything to contribute to a thread, you don't have to say anything.

I'm just not seeing the significance of the statistic.  Longest distance within a state, total distance in the country, sure.

But I'm not sure what a two-state total tells someone.

Well, I was just curious about it. Is that not a good enough reason for you?

Nope.

Would have been interesting if an Interstate passed through two big states to beat I-10 or something like that, though.

[CNGL-Leudimin]

Heck, I once spent hours only to cross Interstate routes and NWS county warning areas datasets. I may bump that thread and update it with the latest AASHTO decissions, and correct an error I've found in the meantime.

[Bickendan]

Does AUS 1 between Western Australia and Northern Territories count? (Small i interstate in this case)

[Rothman]

Heck, I once spent hours only to cross Interstate routes and NWS county warning areas datasets. I may bump that thread and update it with the latest AASHTO decissions, and correct an error I've found in the meantime.

I was thinking perhaps a table of longest routes within a state in one column and another column with longest in two states could be an interesting comparison to see how the rankings compare.

Makes more sense just to trudge through TM or something like that rather than ask people for piecemeal examples.  Of course, then you have the I-35 splits to deal with...

[hbelkins]

I first thought this was going to be something about concurrencies that cross state lines, and my first thoughts were I-39/I-90 in Illinois/Wisconsin, and I-20/I-59 in Mississippi and Alabama.

[J N Winkler]

The forum staff has now received multiple complaints about this thread.  Therefore, I am locking it for a 48-hour cooling-off period.  It will reopen for discussion around two PM CST on January 10, 2024.

Edit:  Now reopened for discussion.  I suggest keeping the following in mind:

*  Whenever possible, assume good faith.

*  Much of this hobby is about collating and comparing.  It's reasonable to ask what deep insights might be gleaned from a particular exercise in doing so; however, these sometimes don't become evident until a dataset is built.

[Molandfreak]

The forum staff has now received multiple complaints about this thread.  Therefore, I am locking it for a 48-hour cooling-off period.  It will reopen for discussion around two PM CST on January 10, 2024.

Edit:  Now reopened for discussion.  I suggest keeping the following in mind:

*  Whenever possible, assume good faith.

*  Much of this hobby is about collating and comparing.  It's reasonable to ask what deep insights might be gleaned from a particular exercise in doing so; however, these sometimes don't become evident until a dataset is built.

You realize the complaints weren't about the thread itself or the topic matter, right? I wish a rule could be established against folks thinking they can be the arbiters of what good discussions are here.

[JayhawkCO]

As nothing says in the OP that the adjacent states have to be directly in "state order" for the highway, Montana and South Dakota (two adjacent states) have ~965 miles of I-90.

[Rothman]

I-10, TX and FL: 1,260

[JayhawkCO]

I-10, TX and FL: 1,260

Not adjacent, my friend. Even if you use the loose definition of "nearby" for adjacency, Florida and Texas would not be it.

[Rothman]

I-10, TX and FL: 1,260

Not adjacent, my friend. Even if you use the loose definition of "nearby" for adjacency, Florida and Texas would not be it.

Ah, I see.

[newyooper]

A couple more out of the ordinary:

North/South: I-25 in New Mexico and Colorado ~462 in NM and ~ 400 in CO for 862 (top 5 on the list?)

North/South: I-75 in Ohio and Michigan ~396 in MI and 211 in OH for 607 total

Southwest/Northeast: I-81 in VA and PA ~325 in VA and ~233 in PA for 557

With the way the states fall, there are not a lot of long north south pairings (a few noted above).

[mgk920]

hat are the longest one state interstates?

Mike

[JayhawkCO]

I-A1 - 408.23 miles
I-87 (NY) - 333.49 miles
I-A4 - 323.69 miles
I-45 - 284.91 miles
I-A2 - 202.18 miles
I-96 - 192.06 miles
I-43 - 191.55 miles
I-16 - 166.81 miles
I-A3 - 148.12 miles
I-17 - 145.76 miles
I-37 - 143.00 miles
I-88 (IL) - 140.60 miles
I-PR2 - 138.13 miles
I-4 - 132.30 miles
I-476 - 129.61 miles
I-27 - 124.13 miles
I-495 (MA) - 121.56 miles

[cockroachking]

I-A1 - 408.23 miles
I-A4 - 323.69 miles
I-45 - 284.91 miles
I-A2 - 202.18 miles
I-96 - 192.06 miles
I-43 - 191.55 miles
I-16 - 166.81 miles
I-A3 - 148.12 miles
I-17 - 145.76 miles
I-37 - 143.00 miles
I-88 (IL) - 140.60 miles
I-PR2 - 138.13 miles
I-4 - 132.30 miles
I-476 - 129.61 miles
I-27 - 124.13 miles
I-495 (MA) - 121.56 miles

I-87 (NY) - 333.49 miles

[jlam]

How about I-10 on the other side of Texas:

I-10, NM and TX: 1,045.27 miles

[JayhawkCO]

I-A1 - 408.23 miles
I-A4 - 323.69 miles
I-45 - 284.91 miles
I-A2 - 202.18 miles
I-96 - 192.06 miles
I-43 - 191.55 miles
I-16 - 166.81 miles
I-A3 - 148.12 miles
I-17 - 145.76 miles
I-37 - 143.00 miles
I-88 (IL) - 140.60 miles
I-PR2 - 138.13 miles
I-4 - 132.30 miles
I-476 - 129.61 miles
I-27 - 124.13 miles
I-495 (MA) - 121.56 miles

I-87 (NY) - 333.49 miles

Edited my list. Quick glanced at a wikipage and missed it. Thanks.