Same-numbered 3dis in neighboring states

[empirestate]

OK, here's the start of a list! Which 3di has the most instances?

RULES:
—3dis must be in adjacent states, but they don't have to be adjacent along the parent Interstate. For example, I-215 counts for NV and UT, even though AZ is between them if you're traveling on I-15.

—Multi-state 3dis count only once towards the total, but for adjacency you can consider each state they're in. For example, I-295 counts for MD (and DC), again for DE/NJ, and once more for NY. So that would score 3, even though we've covered four states. Actually, five, since...

—DC counts as a state. I think this would only make a difference for I-695. Oh yes, and...

—Unsigned 3dis count equally to marked ones.

I'll start with x05 thru x15:

105 - CA, OR (2)
205 - CA, OR/WA (2)
405 - CA, OR, WA (3)
–Extra points for being a "full set": every state reached by I-5 also has an I-405. You'll recall that I-5 is also notable for having a full set of state capitals, and a full set of largest cities (and those two sets don't intersect, to boot).

110 - TX, LA, MS (3)
610 - TX, LA (2)

215 - CA, NV, UT (3)

[froggie]

Would you count officially-designated Future Interstates?  If so, then I-295 bumps up to a count of 5 (NC, VA, DC/MD, DE/NJ, and NY).  Otherwise, I-295's count is at 4 (you missed I-295 VA).

I-495's count is 3 (NC, VA/MD, DE).

[Pete from Boston]

Would you count officially-designated Future Interstates?  If so, then I-295 bumps up to a count of 5 (NC, VA, DC/MD, DE/NJ, and NY).  Otherwise, I-295's count is at 4 (you missed I-295 VA).

6 for 295–New York borders Massachusetts.

I-495's count is 3 (NC, VA/MD, DE).

Again, New York and Mass., but misses Pennsylvania by a hair, otherwise it'd be 6. 

If we were counting just signed roads and it were a few years ago and that one BGS was still there, New Jersey could bridge the gap, but no.

[roadman65]

I-395 is in both neighboring MD and VA. In fact both cities Baltimore and Washington both have their own of two cities less than 50 miles apart.

I think the cause for their being no confusion is that Baltimore's I-395 is that its a glorified exit ramp rather than a full freeway like it is in VA and DC.

[mgk920]

I-280 (IA/IL)
I-129, 480, 680 (IA/NE)
I-255, 270 (IA/MO)
I-235, 435, 670 (KS/MO)
I-535 (MN/WI)



Mike

[empirestate]

So who's got the full list for x95's? Probably a no-brainer that the eventual winner will come from there.

Would you count officially-designated Future Interstates?  If so, then I-295 bumps up to a count of 5 (NC, VA, DC/MD, DE/NJ, and NY).  Otherwise, I-295's count is at 4 (you missed I-295 VA).

Yes, I think I would. I would definitely have counted 295 in NC; I'm less up-to-date on what's happening with 495 there, but if it's the same status, then definitely.

Didn't miss 295 in VA; I wasn't compiling a list for that 3di, just illustrating the adjacency rule using part of it. I only made the list up to x15.

Speaking of which, I'll continue with x220:

220 - LA, MS (2)

[1995hoo]

I think I-440 has three neighboring states: North Carolina (Raleigh), Tennessee (Nashville), and Arkansas (Little Rock). It used to be four, but Oklahoma's I-440 was renumbered.

Arkansas prevents I-240 from having more than two (Asheville, NC, and Memphis, TN).

[froggie]

6 for 295–New York borders Massachusetts.

We'll need clarification on this one.  I didn't count it initially since I-95 goes through Connecticut in between.

I-280 (IA/IL)
I-129, 480, 680 (IA/NE)
I-255, 270 (IA/MO)
I-535 (MN/WI)

The OP stated that multi-state 3dis (all of your examples) only count once...he's looking for the same route number in adjacent states that is not the same route.

Yes, I think I would. I would definitely have counted 295 in NC; I'm less up-to-date on what's happening with 495 there, but if it's the same status, then definitely.

There's a section of I-495 NC that is now official:  from I-440 to I-540.

So with 295, would it be 5 or 6? (see above)

[1995hoo]

So who's got the full list for x95's? Probably a no-brainer that the eventual winner will come from there.

....

The interesting thing about I-95 is how certain states break the string and others have lots of x95s.

Florida has I-195, I-295, I-395, I-595, and Future I-795, but Georgia and South Carolina have no x95s at all. So none of the Florida routes are eligible for this poll.

North Carolina has Future I-295, current I-495 (to be extended in the future) and current I-795.

Virginia has I-195, I-295, I-395 (shared with DC), I-495 (shared with DC/MD), and a one-time proposal for I-595 that was never posted (it's part of US-1). The proposed I-895 became a state route.

Maryland has the most: I-195, I-295 (shared with DC), I-395, I-495 (shared with DC/VA), unsigned I-595, I-695, I-795, and I-895.

DC has I-295, I-395, I-495 (barely a smidgen!), and I-695. All except I-695 are shared.

But then Delaware only has I-295 (shared with NJ) and I-495. So you break the string of I-195, I-395, and I-695, all of which were at two at this point.

Pennsylvania doesn't have any until the x95 number around Trenton is posted.

New Jersey has I-195 and I-295 (shared with DE); I-695 and I-895 were never built and I-495 is gone.

New York has all the evens: I-295, I-495, I-695, and I-895. This breaks the string for odd-numbered x95s.

Connecticut has I-395 (shared with MA).

Rhode Island has I-195 and I-295 (both shared with MA).

Massachusetts has I-195, I-295 (both shared with RI), I-395 (shared with CT) and I-495; I-695 and I-895 were never built.

New Hampshire has none.

Maine has I-195, I-295, I-395, and unsigned I-495.

So you see how the gaps caused by New Hampshire, Georgia, and South Carolina affect things.



From reading the OP, I think the Massachusetts and New York I-295s count: "3dis must be in adjacent states, but they don't have to be adjacent along the parent Interstate. For example, I-215 counts for NV and UT, even though AZ is between them if you're traveling on I-15."

This strongly suggests to me I-295 in Massachusetts and I-295 in New York would count. They are in adjacent states, but Connecticut is between them if you're driving up I-95.

Based on the list above, it seems I-295 has the most of the x95s even if you aren't counting each individual state. As I understand it, Rhode Island doesn't count because Massachusetts does and those two states share the route, and DC doesn't count because Maryland does in order to preserve the Virginia--->Maryland--->Delaware continuity.

[roadman65]

I-90 in New York has every digit used from 1 to 9 in 3 digits.  Neighboring PA has no children, but MA to the east has I-190 and I-290.

[Henry]

Of course, you have I-470 in Kansas City, MO, and Topeka, KS. If the highway around Denver hadn't been downgraded to C-470, that would've made three.

[OCGuy81]

Anybody mention 220 (LA/MS)?

And 235 (KS/OK)

[US71]

I-280 (IA/IL)
I-129, 480, 680 (IA/NE)
I-255, 270 (IA/MO)
I-235, 435, 670 (KS/MO)
I-535 (MN/WI)



Mike

There's no 235 in Missouri, but there IS in Iowa.

[TheStranger]

I-80:
180 (WY, NE) 2 (even if the Wyoming one is not a freeway!)
580 (CA, NV) 2

[US71]

are  I-57 and I-49 the only roads without any 3d's?

[Big John]

are  I-57 and I-49 the only roads without any 3d's?

I-39, I-43 and future I-41 are also childless amongst others i can think of outside WI.

[froggie]

are  I-57 and I-49 the only roads without any 3d's?

I-2, I-4, I-12, I-39, I-86 (both), I-88 (both), I-97 (though it did have two proposed at one point).  Probably others...this is just what I could think of offhand.

[robbones]

I think I-440 has three neighboring states: North Carolina (Raleigh), Tennessee (Nashville), and Arkansas (Little Rock). It used to be four, but Oklahoma's I-440 was renumbered.

Arkansas prevents I-240 from having more than two (Asheville, NC, and Memphis, TN).

I'll see your Arkansas not having 240 to Tennessee not having 540

[OCGuy81]

are  I-57 and I-49 the only roads without any 3d's?

I-2, I-4, I-12, I-39, I-86 (both), I-88 (both), I-97 (though it did have two proposed at one point).  Probably others...this is just what I could think of offhand.

Throw 66, 68, 73, 83, and 99 into the mix too.

[PHLBOS]

Throw 66, 68, 73, 83, and 99 into the mix too.

There's I-283 just south of Harrisburg, PA.; so cross 83 off your list.

[NE2]

I-4 has the highest proportion.

[empirestate]

6 for 295–New York borders Massachusetts.

We'll need clarification on this one.  I didn't count it initially since I-95 goes through Connecticut in between.

Yes, it counts, per the second rule of the OP. The states have to be adjacent, but they don't have to be sequential along the parent route.

So with 295, would it be 5 or 6? (see above)

NC, VA, DC/MD, DE/NJ, NY, RI/MA, so that's 6.

This strongly suggests to me I-295 in Massachusetts and I-295 in New York would count. They are in adjacent states, but Connecticut is between them if you're driving up I-95.

Based on the list above, it seems I-295 has the most of the x95s even if you aren't counting each individual state. As I understand it, Rhode Island doesn't count because Massachusetts does and those two states share the route, and DC doesn't count because Maryland does in order to preserve the Virginia--->Maryland--->Delaware continuity.

Actually, RI would count, because it also shares a border with NY, albeit in open waters. So I-295 counts either way (but still counts only once).

As for I-295 DC, that also counts either way. I-95 hits DC before it hits MD, so I'd score it as "...VA, DC/MD, DE...", but if 295 weren't in DC it would still count since MD is adjacent to VA.

Anybody mention 220 (LA/MS)?

Yes, I did, in my continuation of the list. I think we're up to x35s now.

are  I-57 and I-49 the only roads without any 3d's?

Hey, no fair drifting off the topic! The whole reason this thread exists is because Alps didn't want it in that other thread. 

[jhuntin1]

I-265 (IN, KY - they're still separate 3-dis until the new Ohio River bridge is built)
I-275 (OH, IN, KY)

[empirestate]

I-265 (IN, KY - they're still separate 3-dis until the new Ohio River bridge is built)
I-275 (OH, IN, KY)

OK, I see how 265 is two separate routes, but what are your adjacent candidates for 275?


iPhone

[bzakharin]

Not an interstate, but both PA and Ohio have a US-322. Also, depending on whom you ask, I-676 in NJ and PA is either one route or two, with a gap between I-95 in Philadelphia and the NJ state line.