Hierarchy of Interstates in the Lower 48.

[ColossalBlocks]

What is the hierarchy of all the Interstates (excluding 3dis) in the entire Lower 48?

[hotdogPi]

http://www.kurumi.com/roads/rank2di.html

It's a bit outdated (I-2 and I-41 aren't listed, and I-49 has since been extended), but it's still a good list.

[US 89]

http://www.kurumi.com/roads/rank2di.html

It's a bit outdated (I-2 and I-41 aren't listed, and I-49 has since been extended), but it's still a good list.

Based on that numbering system, I-2 scores:
1 x 47 miles = 47
200 x 1 state = 200
100 x 1 minor 2di generated (69c) = 100
50 x 1 minor 2di interesected (69e) = 50
for a total of 397, which puts it even below I-86w.

I-41 scores:
1 x 176 miles = 176
200 x 2 states = 400
50 x 2 minor 2di intersected (94, 43) = 100
100 x 1 1M metro (Milwaukee) = 100
for a total of 776 which puts it between I-86E and I-16.

[english si]

It needs I-69, I-73, I-74 and I-86e extensions as well as I-49. Oh, and to acknowledge the existence of I-99.

Plus I-14 exists (and perhaps one should include I-11, I-42 and I-87s to spare it's blushes).

[US 89]

Oh, and to acknowledge the existence of I-99.

Unfortunately, no matter how hard you wish for something (like I-99) to disappear, it won't.

[froggie]

What is the hierarchy of all the Interstates (excluding 3dis) in the entire Lower 48?

Which begs the question of how one would define that hierarchy...

[sparker]

Kurumi's calculations are valid -- but to render the list more statistically significant it would be nice to include AADT (or at least a mean figure for the full route) into the calculus.  Probably would take months (if not longer) of poring over raw data, but it would add the concept of actual usage into the mix rather than just the preliminary utility of each route, which is essentially what the present model assesses.   

[english si]

Oh, and to acknowledge the existence of I-99.

Unfortunately, no matter how hard you wish for something (like I-99) to disappear, it won't.

Yes, that's my point!

[TheHighwayMan3561]

http://www.kurumi.com/roads/rank2di.html

It's a bit outdated (I-2 and I-41 aren't listed, and I-49 has since been extended), but it's still a good list.

Based on that numbering system, I-2 scores:
1 x 47 miles = 47
200 x 1 state = 200
100 x 1 minor 2di generated (69c) = 100
50 x 1 minor 2di interesected (69e) = 50
for a total of 397, which puts it even below I-86w.

I-41 scores:
1 x 176 miles = 176
200 x 2 states = 400
50 x 2 minor 2di intersected (94, 43) = 100
100 x 1 1M metro (Milwaukee) = 100
for a total of 776 which puts it between I-86E and I-16.

And I-99:

Miles (total existing between two segments): 85
2 x 200 states: 400
2 x 100 major 2di intersected (70, 80): 200
2 x 50 minor 2di intersected (76, 86): 100
Total: 785, which puts it between I-16 and the eastern I-86

Corrected for faulty math/misread scoring criteria.

[Bickendan]

http://www.kurumi.com/roads/rank2di.html

It's a bit outdated (I-2 and I-41 aren't listed, and I-49 has since been extended), but it's still a good list.

Based on that numbering system, I-2 scores:
1 x 47 miles = 47
200 x 1 state = 200
100 x 1 minor 2di generated (69c) = 100
50 x 1 minor 2di interesected (69e) = 50
for a total of 397, which puts it even below I-86w.

I-41 scores:
1 x 176 miles = 176
200 x 2 states = 400
50 x 2 minor 2di intersected (94, 43) = 100
100 x 1 1M metro (Milwaukee) = 100
for a total of 776 which puts it between I-86E and I-16.

I-94's a minor Interstate?!

[hotdogPi]

http://www.kurumi.com/roads/rank2di.html

It's a bit outdated (I-2 and I-41 aren't listed, and I-49 has since been extended), but it's still a good list.

Based on that numbering system, I-2 scores:
1 x 47 miles = 47
200 x 1 state = 200
100 x 1 minor 2di generated (69c) = 100
50 x 1 minor 2di interesected (69e) = 50
for a total of 397, which puts it even below I-86w.

I-41 scores:
1 x 176 miles = 176
200 x 2 states = 400
50 x 2 minor 2di intersected (94, 43) = 100
100 x 1 1M metro (Milwaukee) = 100
for a total of 776 which puts it between I-86E and I-16.

I-94's a minor Interstate?!

The Perl code seems to consider 94 major, but calling something major or minor as part of the process of ranking them seems suspicious.

[US 89]

http://www.kurumi.com/roads/rank2di.html

It's a bit outdated (I-2 and I-41 aren't listed, and I-49 has since been extended), but it's still a good list.

Based on that numbering system, I-2 scores:
1 x 47 miles = 47
200 x 1 state = 200
100 x 1 minor 2di generated (69c) = 100
50 x 1 minor 2di interesected (69e) = 50
for a total of 397, which puts it even below I-86w.

I-41 scores:
1 x 176 miles = 176
200 x 2 states = 400
50 x 2 minor 2di intersected (94, 43) = 100
100 x 1 1M metro (Milwaukee) = 100
for a total of 776 which puts it between I-86E and I-16.

I-94's a minor Interstate?!

The Perl code seems to consider 94 major, but calling something major or minor as part of the process of ranking them seems suspicious.

I thought that major 2dis were x0 and x5 routes, and minor was everything else.

[TheHighwayMan3561]

I thought that major 2dis were x0 and x5 routes, and minor was everything else.

Strictly speaking, yes, but I-94 is arguably part of the major group. 1500+ miles, 4 metro areas of 1+ million, serves the largest city in every state it travels through. Between Chicago and Billings, I-90 is like the "bypass" and I-94 the "city" route of the Upper Midwest.

[US 89]

I thought that major 2dis were x0 and x5 routes, and minor was everything else.

Strictly speaking, yes, but I-94 is arguably part of the major group. 1500+ miles, 4 metro areas of 1+ million, serves the largest city in every state it travels through. Between Chicago and Billings, I-90 is like the "bypass" and I-94 the "city" route of the Upper Midwest.

I agree with that, but there has to be a way to designate major and minor interstates without ranking them, because that's the purpose of Kurumi's page (and this thread). Using x0 and x5 for major routes seemed like the easiest way to do that.

[vdeane]

Except then you have I-30 and I-45 classified as "major" and I-81 and I-94 classified as "minor".  Maybe count everything that exceeds a certain length as "major" (top 20?)?  If we go with everything over 700 miles (which gets us the top 20), it's I-90, I-80, I-40, I-10, I-70, I-95, I-75, I-94, I-35, I-20, I-15, I-5, I-25, I-55, I-64, I-65, I-81, I-84 (western), I-29, and I-69.  Drop to 650 miles to add I-85.

[sparker]

I thought that major 2dis were x0 and x5 routes, and minor was everything else.

Strictly speaking, yes, but I-94 is arguably part of the major group. 1500+ miles, 4 metro areas of 1+ million, serves the largest city in every state it travels through. Between Chicago and Billings, I-90 is like the "bypass" and I-94 the "city" route of the Upper Midwest.

I agree with that, but there has to be a way to designate major and minor interstates without ranking them, because that's the purpose of Kurumi's page (and this thread). Using x0 and x5 for major routes seemed like the easiest way to do that.

The use of "0" and "5" to delineate "major" Interstates was one of the principal reasons for the plethora of suffixed numbers in the original numerical iteration of the system circa 1957-58, when the system designations were initially finalized.  Cities not served by a 0 or 5 tended to piss & moan until they got some variation of their way (hence Portland getting "80N", Philadelphia getting "80S", and the 70N/70S "split" for, respectively, Baltimore and Washington (actually one of the few that made sense!).  Houston, then as now the largest Texas incorporated city, got the short "45" for that reason -- although in retrospect that number would have made more sense on a longer route such as the section of I-35 north of Kansas City (I-29 could have easily been I-35).  It could be arguably stated that the perpetually convoluted state of Midwest numbering stems from the practice of ensuring that certain major cities lay at the junctions of zeros and fives (of course, ensuring that Interstate and US routes weren't in conflict was always going to contribute to issues within the geographical center of the nation as well)!  Trying to please everyone at the expense of system integrity is never a viable long-term prospect! 

[Bickendan]

I thought that major 2dis were x0 and x5 routes, and minor was everything else.

Strictly speaking, yes, but I-94 is arguably part of the major group. 1500+ miles, 4 metro areas of 1+ million, serves the largest city in every state it travels through. Between Chicago and Billings, I-90 is like the "bypass" and I-94 the "city" route of the Upper Midwest.

also,  it's the only even 2di to hit an international border.

[Roadgeekteen]

I thought that major 2dis were x0 and x5 routes, and minor was everything else.

Strictly speaking, yes, but I-94 is arguably part of the major group. 1500+ miles, 4 metro areas of 1+ million, serves the largest city in every state it travels through. Between Chicago and Billings, I-90 is like the "bypass" and I-94 the "city" route of the Upper Midwest.

also,  it's the only even 2di to hit an international border.

I-2 is close.

[bing101]

I-95, I-5 and I-80 would have to be up there for legendary interstates in the 48.

[Bickendan]

I thought that major 2dis were x0 and x5 routes, and minor was everything else.

Strictly speaking, yes, but I-94 is arguably part of the major group. 1500+ miles, 4 metro areas of 1+ million, serves the largest city in every state it travels through. Between Chicago and Billings, I-90 is like the "bypass" and I-94 the "city" route of the Upper Midwest.

also,  it's the only even 2di to hit an international border.

I-2 is close.

Close, but as far as I can tell, I-2 isn't intended to hit the border.
Technically, 19 and 35 also don't cross, leaving 5, 110, and future 69W as the ones that cross the southern border.

[US 89]

I thought that major 2dis were x0 and x5 routes, and minor was everything else.

Strictly speaking, yes, but I-94 is arguably part of the major group. 1500+ miles, 4 metro areas of 1+ million, serves the largest city in every state it travels through. Between Chicago and Billings, I-90 is like the "bypass" and I-94 the "city" route of the Upper Midwest.

also,  it's the only even 2di to hit an international border.

I-2 is close.

Close, but as far as I can tell, I-2 isn't intended to hit the border.
Technically, 19 and 35 also don't cross, leaving 5, 110, and future 69W as the ones that cross the southern border.

Although the 19 and 35 freeways end before the border, in both cases there is a direct connection to a border crossing.

[21stCenturyRoad]

For
I-4, here's the new calculation:
Length: 1*132 Miles=132
States: 200*1(FL)=200
Major 2di Intersections: 100(2)=200 (I-75, I-95)
Metro Areas: 100(5)=500 (3M Tampa, 2M Orlando)
=1032

[Roadgeekteen]

I thought that major 2dis were x0 and x5 routes, and minor was everything else.

Strictly speaking, yes, but I-94 is arguably part of the major group. 1500+ miles, 4 metro areas of 1+ million, serves the largest city in every state it travels through. Between Chicago and Billings, I-90 is like the "bypass" and I-94 the "city" route of the Upper Midwest.

also,  it's the only even 2di to hit an international border.

I-2 is close.

Close, but as far as I can tell, I-2 isn't intended to hit the border.
Technically, 19 and 35 also don't cross, leaving 5, 110, and future 69W as the ones that cross the southern border.

The southern part of 69e should be I-2