Shortest Mileage Sum of Two 2di Interstates in One State?

[Grzrd]

A. Smallest Total For Smallest Mileage Sum

My first guess is Georgia:

I-24 (4 miles) + I-59 (20.67 miles) = 24.67 miles

http://www.southeastroads.com/i-024_ga.html

http://www.southeastroads.com/i-059_ga.html

B. Greatest Total For Smallest Mileage Sum

I cannot even venture a guess at this point.

[oscar]

Do the 2dis have to intersect in the state?  If so, GA beats even HI (leaving aside whether the single-digit H- routes should be counted as 2dis).  If not, H-2 and H-3 sum to about 23.6 miles.

[Grzrd]

Do the 2dis have to intersect in the state?  If so, GA beats even HI (leaving aside whether the single-digit H- routes should be counted as 2dis).  If not, H-2 and H-3 sum to about 23.6 miles.

No intersection required.  Although, if someone wants to take the extra step of requiring an intersection ... then by all means have at it!

[Ian]

-I-495/I-95 on the DC beltway go into the actual district for only a few hundred feet while on the Woodrow Wilson Bridge

-NY 17/Future I-86 dips into Pennsylvania for about a 1/4 mile

[TheStranger]

-I-495/I-95 on the DC beltway go into the actual district for only a few hundred feet while on the Woodrow Wilson Bridge

To go back to the original question, I-66 spends what, 2 miles in DC?  So between 66 and 95, DC only has a full 2.5 miles of 2di!

[froggie]

Ian:  he's looking for two 2dis...both of your examples are only one.

Now with no-intersection required, then DC winds hands-down with I-66 (~1.2mi) + I-95 (~0.1mi) = 1.3mi

Excluding DC, I'd hazard a bet that the Georgia example cited is the winner.

[Ian]

Ian:  he's looking for two 2dis...both of your examples are only one.

Doesn't NY 17 (Future I-86) count?

[Grzrd]

Doesn't NY 17 (Future I-86) count?

Apologies for poor phrasing of question.  The two 2dis must be in the SAME state (in my example, Georgia).

Now with no-intersection required, then DC winds hands-down with I-66 (~1.2mi) + I-95 (~0.1mi) = 1.3mi

Excluding DC, I'd hazard a bet that the Georgia example cited is the winner.

I think D.C. is winner (great immediate observation), BUT I will exclude it because it is a federal district and not a state.

[agentsteel53]

B. Greatest Total For Smallest Mileage Sum

I cannot even venture a guess at this point.

South Dakota (90 and 29).  412 + 251 miles.  beats Montana (94 and 15) by about 15 miles.

[english si]

Does I-80 reach New York City? I thought it multiplexed with I-95 across the Hudson. If so then I-80 and I-78 in New York must give DC a run for it's money.

[74/171FAN]

Does I-80 reach New York City? I thought it multiplexed with I-95 across the Hudson. If so then I-80 and I-78 in New York must give DC a run for it's money.

No it ends at I-95 around Fort Lee, NJ.  It's just that some of the map-making people like to screw that up 

[TheStranger]

Does I-80 reach New York City? I thought it multiplexed with I-95 across the Hudson. If so then I-80 and I-78 in New York must give DC a run for it's money.

No it ends at I-95 around Fort Lee, NJ.  It's just that some of the map-making people like to screw that up 

Having said that, once I-99 is complete, that and I-78 in NY would be a contender (though not as short as DC I presume)!

[Michael in Philly]

Does I-80 reach New York City? I thought it multiplexed with I-95 across the Hudson. If so then I-80 and I-78 in New York must give DC a run for it's money.

No it ends at I-95 around Fort Lee, NJ.  It's just that some of the map-making people like to screw that up  

And I-78 really has no business entering New York anyhow, given the state of the approaches to the Holland Tunnel on the New Jersey side.  Certain roadgeeks who insist that I-676 is two separate routes, because of one traffic light at the Philadelphia end of the bridge, but accept the purported I-78 in New York without question ought to re-examine their standards.  :-)
Post Merge: December 31, 1969, 07:59:59 PM

B. Greatest Total For Smallest Mileage Sum

I cannot even venture a guess at this point.

South Dakota (90 and 29).  412 + 251 miles.  beats Montana (94 and 15) by about 15 miles.

"Greatest total for smallest mileage sum"?  I'm not even sure what that means....
Post Merge: December 31, 1969, 07:59:59 PM
How 'bout 70 and 81 in West Virginia (for third place after D.C. and Georgia)?  Or would it be 81 and 97 in Maryland?

EDIT: dam post merge screwing up again - merging a triple post at September 02, 2010, 01:16:40 PM --ms

[Grzrd]

B. Greatest Total For Smallest Mileage Sum

I cannot even venture a guess at this point.

South Dakota (90 and 29).  412 + 251 miles.  beats Montana (94 and 15) by about 15 miles.

"Greatest total for smallest mileage sum"?  I'm not even sure what that means....

Again, poorly phrased on my part. (1) Find a state; (2) Identify all of its 2di Interstates; (3) Figure out total mileage for each 2di; (4) Identify 2 smallest numbers; (5) Find sum of 2 smallest numbers; (6) Repeat for other 49 states; (7) Which state has greatest sum?

[TheStranger]

B. Greatest Total For Smallest Mileage Sum

I cannot even venture a guess at this point.

South Dakota (90 and 29).  412 + 251 miles.  beats Montana (94 and 15) by about 15 miles.

"Greatest total for smallest mileage sum"?  I'm not even sure what that means....

What that means:

For the shortest combo of 2dis in any given state, what is the largest milage compared to other shortest-2di-combos-in-a-state?

[agentsteel53]

And I-78 really has no business entering New York anyhow, given the state of the approaches to the Holland Tunnel on the New Jersey side.  Certain roadgeeks who insist that I-676 is two separate routes, because of one traffic light at the Philadelphia end of the bridge, but accept the purported I-78 in New York without question ought to re-examine their standards.  :-)

first we find a state-named I-78 New York shield.  then we continue this discussion!

[froggie]

Having said that, once I-99 is complete, that and I-78 in NY would be a contender (though not as short as DC I presume)!

Once I-99 is complete, you'd have I-99 (~12.5mi) + I-78 (0.5mi) = 13mi.  Which would make it shorter than the Georgia example.  Until then, you have I-95 (~23.5mi) + I-78 (0.5mi) = 24mi, which is still (just barely) shorter than Georgia, so looks like New York takes the kudos.

The West Virginia example suggested:  I-70 (~14.2mi) + I-81 (~26.0mi) = ~40.2mi

The Maryland example suggested:  I-81 (12.08mi) + I-97 (17.62mi) = 29.7mi

[mightyace]

This one's no longer true, but back in 2002 when Alex got the figures for the Interstate Guide on the main AARoads site (http://www.interstate-guide.com/index.html), you had this in Missouri:

I-72: 2.04 mi
I-64: 14.69mi
Total: 16.73 mi - which was probably first at the time.

Now that I-64 has been extended

I-72: 2.04 mi
I-57: 21.96 mi
Total: 24 mi

So, until I-99 is extended, we have a tie between Missouri and New York.

[iwishiwascanadian]

What about I-684 in Westchester County, NY?  It runs in Connecticut without a junction.  I'm not sure of the mileage though...

[thenetwork]

Rough estimates:

OHIO:

I-277 -- 3.9 Miles
I-490 -- 2.4 Miles

TOTAL - 6.3 MILES



INDIANA:

I-275 -- 3.2 Miles
I-865 -- 4.6 Miles

TOTAL - 7.8 MILES

Crap, I didn't see the 2di rule.  Oh well, these probably are close to being the shortest states for 3-dis nationwide.

[froggie]

3-digit Interstate routes aren't applicable, per the original poster.

[Duke87]

The shortest two 2dis in Delaware are I-95 (23.43 miles) and there is nothing else (0.00 miles). Total: 23.43 miles.

Does that count?

[Grzrd]

The shortest two 2dis in Delaware are I-95 (23.43 miles) and there is nothing else (0.00 miles). Total: 23.43 miles.

Does that count?

Only if you let Alaska beat Delaware: 0+0=0.

[agentsteel53]

Only if you let Alaska beat Delaware: 0+0=0.

Alaska has unsigned interstates.  the state of, say, Sonora, does not even have those.

[Grzrd]

Once I-99 is complete, you'd have I-99 (~12.5mi) + I-78 (0.5mi) = 13mi.  Until then, you have I-95 (~23.5mi) + I-78 (0.5mi) = 24mi

Now that I-64 has been extended

I-72: 2.04 mi
I-57: 21.96 mi
Total: 24 mi

So, until I-99 is extended, we have a tie between Missouri and New York.

If they can beat I-99 extension timewise, then Tennessee is still in running for "temporary title".  If TDOT surprises us and opts to tie-in I-22 to I-240 (recommendation to be released in October), then they would have 18.75 to 19 miles.  I-55 (12.28) + I-22 (approx. 6.5).  But, they could then "blow it" by multiplexing I-22 to (ironically enough) I-55 for a tidy 2di to 2di connection.