Longest Interstate You Haven't Been On

[Mike2357]

I was curious what mine was. Looked it up, and found out it was I-25. Odd, considering I've been through all three states I-25 is in.

What's yours?

I-90. The closest I have ever gotten to it was driving up I-91 to Six Flags New England (my home park I NJ the rides are constantly breaking down). I-90 is the longest interstate highway in the US btw, darn, was hoping that title would go to I-80.

[Alex]

I-781, the only other I haven't been on is I-790.

This doesn't count the hidden Alaska and Puerto Rico Interstates.

[Rothman]

I-781, the only other I haven't been on is I-790.

This doesn't count the hidden Alaska and Puerto Rico Interstates.

Hm.  Wonder how you managed that.

[planxtymcgillicuddy]

I-20 or I-64, though I will be crossing I-20 off my list during me and my friend's trip to Darlington

[Scott5114]

Mine is I-15. Haven't gotten that far west yet.

[odditude]

I-94 for me.

[formulanone]

Looks like I-72 is the longest Interstate I've never traveled upon.

Mainlines remaining: 19, 11, and "southern" 87.

I picked up about two-thirds of I-72 last month, so I-86 in Idaho (oops), then I-19 is now my longest untraveled interstate.

[MikieTimT]

Mine is I-77, although there is a possibility it could be I-85 as I haven't tried to remember back to my 1 trip each to Montgomery, AL and Atlanta, GA for any possible concurrencies.  Try to specifically avoid both cities when traveling the Southeast as I have an unreasonable loathing of traffic.

[Arkansastravelguy]

I-96 is the only 2di I have not picked up. And PR 1-4


iPhone

[LilianaUwU]

Well, as I never went to the United States, the longest Interstate I haven't been on is also the longest Interstate, period.

[vegas1962]

I-44.  My cheapies are I-85 (via the Downtown Atlanta Connector concurrency with I-75) and I-84 (via the concurrency with I-15 in Utah).

[JayhawkCO]

Eastern I-86 - 222.26 miles.

For the record, the only 2dis I haven't been on are I-2, I-14, eastern I-86, southern I-87, eastern I-88, the Hawai'i interstates, and the Puerto Rico interstates.

Time to update.  My longest is now I-PR2.  My longest signed is now I-196 I-35W in Texas.

My Top 25 24
I-86 (PA/NY) - 223.39 mi
I-PR2 (PR)- 138.13
I-476 (PA) - 129.61 Clinched!
I-495 (MA) - 121.56
I-88 (NY) - 117.75 Clinched!
I-35W (TX) - 85.20
I-196 (MI) - 80.65
I-840 (TN) - 77.28
I-390 (NY) - 76.06
I-380 (IA) - 73.05
I-PR1 (PR) - 71.08
I-495 (NY) - 71.02
I-165 (KY) - 69.684
I-485 (NC) - 66.68
I-395 (CT/MA) - 66.60
I-69E (TX) - 61.10
I-270 (OH) - 54.97
I-295 (ME) - 53.11 Clinched!
I-2 (TX) - 46.80
I-530 (AR) - 46.65
I-271 (OH) - 46.06
I-269 (MS/TN) - 45.19
I-195 (RI/MA) - 44.55
I-385 (SC) - 42.16
I-480 (OH) - 41.77
I-PR3 (PR) - 40.56
I-490 (NY) - 37.40

Other 2dis
I-H1 (HI) - 27.16
I-14 (TX) - 25.10
I-69C (TX) - 18.00
I-H3 (HI) - 15.32
I-87 (NC) - 12.90
I-H2 (HI) - 8.33
I-69W (TX) - 1.40

[NWI_Irish96]

Longest interstate I haven't been on is western I-84.

EDIT: I forgot that I-84 has a concurrency with I-15 in Utah that I've been on.  I've also been on I-29, I-85 and I-77 solely due to concurrencies with other interstates, so the longest one I haven't been on is I-49.

I've been on at least part of every x0 and x5.

Mine was incorrect.

Longest I haven't been on other than a concurrency is the western I-84.

I have been on I-49 in a concurrency with I-40, so the longest I haven't been on any part of is I-91. Actually could have been on it this summer but we went through Brattleboro on US 5 instead so we could stop for gas and ice cream.

[tigerwings]

Based on this site  https://en.wikipedia.org/wiki/List_of_Interstate_Highways

It's I-84. Been at the junction with I-80, but never on it.

[jlam]

I have been on I-49 in a concurrency with I-40, so the longest I haven't been on any part of is I-91. Actually could have been on it this summer but we went through Brattleboro on US 5 instead so we could stop for gas and ice cream.

I-49 is never concurrent with I-40. Did you mean I-44?

[NWI_Irish96]

I have been on I-49 in a concurrency with I-40, so the longest I haven't been on any part of is I-91. Actually could have been on it this summer but we went through Brattleboro on US 5 instead so we could stop for gas and ice cream.

I-49 is never concurrent with I-40. Did you mean I-44?

Yes, that's it. 44.

[SEWIGuy]

I have been on I-49 in a concurrency with I-40, so the longest I haven't been on any part of is I-91. Actually could have been on it this summer but we went through Brattleboro on US 5 instead so we could stop for gas and ice cream.

I-49 is never concurrent with I-40. Did you mean I-44?

Yes, that's it. 44.

It is?  <checks map>  Huh.

I guess that changes my answer to I-86.

[JayhawkCO]

I have been on I-49 in a concurrency with I-40, so the longest I haven't been on any part of is I-91. Actually could have been on it this summer but we went through Brattleboro on US 5 instead so we could stop for gas and ice cream.

I-49 is never concurrent with I-40. Did you mean I-44?

Yes, that's it. 44.

It is?  <checks map>  Huh.

I guess that changes my answer to I-86.

Which one?

[SEWIGuy]

I have been on I-49 in a concurrency with I-40, so the longest I haven't been on any part of is I-91. Actually could have been on it this summer but we went through Brattleboro on US 5 instead so we could stop for gas and ice cream.

I-49 is never concurrent with I-40. Did you mean I-44?

Yes, that's it. 44.

It is?  <checks map>  Huh.

I guess that changes my answer to I-86.

Which one?

Eastern.  Although I haven't been on either one.

[clong]

It's either I-80, I-15 or Western I-84 - ironically all travel in or near SLC.

I went to conferences in Reno and SLC in the late 90s, but took a taxi from the airport to the convention center and don't know the route we took in either place.

If you went to downtown SLC, you probably took both I-80 and I-15.

Actually, probably not I-15. The fastest way from the SLC airport to the convention center is almost certainly the 600 and 500 South ramps directly from I-80; that movement does not involve I-15. That interchange was reconfigured around 2000, but I'm fairly sure the actual 15/80 merge point was still beyond the downtown viaducts.

Though unlikely, there's a chance that your taxi took North Temple into the city, which doesn't use any freeways. If you remember taking a freeway, it was almost certainly I-80.

I remembered I had been on I-80 when I went to Reno for a conference, so my answer is now either I-15 (possibility of a very short stint in Salt Lake City) or Western I-84.

[ethanhopkin14]

Just a curious post:

Can you really say you have been on an interstate if the only part you have been on was a cosign of a through route you were taking?

[SEWIGuy]

Just a curious post:

Can you really say you have been on an interstate if the only part you have been on was a cosign of a through route you were taking?

Yep. 

[TheHighwayMan3561]

Just a curious post:

Can you really say you have been on an interstate if the only part you have been on was a cosign of a through route you were taking?

Yep. 

I also say yes, though I know some people with stricter personal clinching rules who would say they have not.

[SkyPesos]

Just a curious post:

Can you really say you have been on an interstate if the only part you have been on was a cosign of a through route you were taking?

Yes

I'm not sure why (for example) I wouldn't count myself being on I-57 when the only parts I've only been on are the concurrencies with I-64 and I-70. It's still marked as I-57 on the BGS and reassurance shields.

It gets a bit more complicated for unsigned routes, like if you've been on I-25 in Colorado, would you count that as being on US 87 as well?

[JayhawkCO]

Yep.  It's still that road whether or not the powers that be erect signs.