3di

[robbones]

If there is a thread on here, please post the link.  IIRC, I 110 in Mississippi is 4-5 miles in length. Are there any shorter 3dis?

[Zeffy]

Just off the top of my head, I believe I-189 in Vermont is less than 2 miles long.

[SteveG1988]

http://www.kurumi.com/roads/3di/long3di.html


    0.70 miles - I-878, New York. Not signed as an interstate.
    0.83 miles - I-315, Montana. Not signed as an interstate.
    1.06 miles - I-375, Michigan. The nation's (current) shortest signed interstate.
    1.09 miles - I-180, Wyoming. The only interstate that is not a freeway.
    1.12 miles - I-895, New York.
    1.20 miles - I-194, North Dakota.
    1.21 miles - I-587, New York.
    1.29 miles - I-395, Florida.
    1.34 miles - I-375, Florida.
    1.39 miles - I-115, Montana.
    1.40 miles - I-345, Texas.
    1.44 miles - I-175, Florida.
    1.49 miles - I-189, Vermont.
    1.50 miles - I-705, Washington State.
    1.57 miles - I-579, Pennsylvania. Was 1.30 miles in 1998.
    1.67 miles - I-381, Virginia. Was 1.17 miles in 1998; the official endpoint(s) changed.
    1.98 miles - I-395, Maryland. In 1998, this was the shortest signed interstate at 0.72 miles. But more recent federal highway logs consider I-395 to be nearly 2 miles long.

[bing101]

http://en.wikipedia.org/wiki/Interstate_380_(California)

I-380 in San Bruno to SFO is 1.67 Miles

http://en.wikipedia.org/wiki/California_State_Route_480
I-480 or CA-480 was very short because the Western freeway never existed.

http://en.wikipedia.org/wiki/Interstate_980
I-980 is 2 miles long in Oakland.

http://en.wikipedia.org/wiki/Interstate_238

I-238 is 2.1 miles long in Hayward.

[bing101]

http://en.wikipedia.org/wiki/Interstate_110_(Texas)

Theres the I-110 Freeway in Texas its 0.89 Miles

http://en.wikipedia.org/wiki/Interstate_535

Its 2.7 miles in Minnesota.

http://en.wikipedia.org/wiki/Interstate_335_(Minnesota)
its 2.74 miles long.

[freebrickproductions]

I-124 (unsigned) in Chattanooga, TN is 2 miles long.
http://en.wikipedia.org/wiki/Interstate_124

[Alex]

http://en.wikipedia.org/wiki/Interstate_110_(Texas)

Theres the I-110 Freeway in Texas its 0.89 Miles

http://en.wikipedia.org/wiki/Interstate_535

Its 2.7 miles in Minnesota.

http://en.wikipedia.org/wiki/Interstate_335_(Minnesota)
its 2.74 miles long.

I-335 in Minnesota? It is zero miles because it was never built. 

http://www.ajfroggie.com/roads/minnesota/cancelled/i335.htm

[robbones]

Is there any I even xx loops longer than I 275 around Cincinnati Ohio. IIRC its 84 miles in length.

[adventurernumber1]

Is there any I even xx loops longer than I 275 around Cincinnati Ohio. IIRC its 84 miles in length.

IIRC that is the longest beltway.

Also, there are too many short 3dis to count. Off the top of my head, some super short 3dis are I-189 in Burlington, VT (as mentioned earlier by Zeffy), I-175 & I-375 in St. Petersburg, FL, I-516 in Savannah, GA, and more.

[Zeffy]

Is there any I even xx loops longer than I 275 around Cincinnati Ohio. IIRC its 84 miles in length.

I-435 in Kansas City comes close with 80 miles, but I'm pretty sure I-275 is the longest loop Interstate.

[freebrickproductions]

I'm pretty sure that any 3di that's just a glorified set of ramps is a rather short one.

[hotdogPi]

About long beltways: I-495 is a half beltway around Boston (the other half is the ocean), and it is 120 miles long.

[bugo]

I-194 in Bismarck/Mandan is unsigned.

[Alps]

i think Kurumi's link suffices

[SD Mapman]

http://www.kurumi.com/roads/3di/long3di.html


    0.70 miles - I-878, New York. Not signed as an interstate.
    0.83 miles - I-315, Montana. Not signed as an interstate.
    1.06 miles - I-375, Michigan. The nation's (current) shortest signed interstate.
    1.09 miles - I-180, Wyoming. The only interstate that is not a freeway.
    1.12 miles - I-895, New York.
    1.20 miles - I-194, North Dakota.
    1.21 miles - I-587, New York.
    1.29 miles - I-395, Florida.
    1.34 miles - I-375, Florida.
    1.39 miles - I-115, Montana.
    1.40 miles - I-345, Texas.
    1.44 miles - I-175, Florida.
    1.49 miles - I-189, Vermont.
    1.50 miles - I-705, Washington State.
    1.57 miles - I-579, Pennsylvania. Was 1.30 miles in 1998.
    1.67 miles - I-381, Virginia. Was 1.17 miles in 1998; the official endpoint(s) changed.
    1.98 miles - I-395, Maryland. In 1998, this was the shortest signed interstate at 0.72 miles. But more recent federal highway logs consider I-395 to be nearly 2 miles long.

What about I-190 (SD)? 1.72 lovely miles.

i think Kurumi's link suffices

Yes. Yes it does.

[kurumi]

http://www.kurumi.com/roads/3di/long3di.html


    0.70 miles - I-878, New York. Not signed as an interstate.
    0.83 miles - I-315, Montana. Not signed as an interstate.
    1.06 miles - I-375, Michigan. The nation's (current) shortest signed interstate.
    1.09 miles - I-180, Wyoming. The only interstate that is not a freeway.
    1.12 miles - I-895, New York.
    1.20 miles - I-194, North Dakota.
    1.21 miles - I-587, New York.
    1.29 miles - I-395, Florida.
    1.34 miles - I-375, Florida.
    1.39 miles - I-115, Montana.
    1.40 miles - I-345, Texas.
    1.44 miles - I-175, Florida.
    1.49 miles - I-189, Vermont.
    1.50 miles - I-705, Washington State.
    1.57 miles - I-579, Pennsylvania. Was 1.30 miles in 1998.
    1.67 miles - I-381, Virginia. Was 1.17 miles in 1998; the official endpoint(s) changed.
    1.98 miles - I-395, Maryland. In 1998, this was the shortest signed interstate at 0.72 miles. But more recent federal highway logs consider I-395 to be nearly 2 miles long.

What about I-190 (SD)? 1.72 lovely miles.

i think Kurumi's link suffices

Yes. Yes it does.

I need to proof it, though... Texas I-110 (0.92 mi) should be there, for example.

[Henry]

About long beltways: I-495 is a half beltway around Boston (the other half is the ocean), and it is 120 miles long.

That would make it the second-longest 3di, after I-476 (a spur that serves Scranton/Wilkes-Barre, Allentown and the western Philadelphia suburbs) which clocks in at 129 miles.

[sbeaver44]

About long beltways: I-495 is a half beltway around Boston (the other half is the ocean), and it is 120 miles long.

That would make it the second-longest 3di, after I-476 (a spur that serves Scranton/Wilkes-Barre, Allentown and the western Philadelphia suburbs) which clocks in at 129 miles.

Only because I-476 ate PA 9 for lunch in 1996.

[hbelkins]

http://www.kurumi.com/roads/3di/long3di.html
    1.67 miles - I-381, Virginia. Was 1.17 miles in 1998; the official endpoint(s) changed.

From where to where?

Virginia took the VA 381 signage down quite some time ago, but when it still existed, the transition point was not the traffic light at Keys Street, but at a point north of there, in the curve near where Piedmont Avenue makes its 90-degree turn.

Given the existence of I-180 in Wyoming, there is precedent for designating and signing I-381 all the way to Lee Highway.

[PHLBOS]

About long beltways: I-495 is a half beltway around Boston (the other half is the ocean), and it is 120 miles long.

That would make it the second-longest 3di, after I-476 (a spur that serves Scranton/Wilkes-Barre, Allentown and the western Philadelphia suburbs) which clocks in at 129 miles.

Only because I-476 ate PA 9 for lunch in 1996.

The I-495 in MA ate most of MA 25 during the 1980s.

[roadman]

About long beltways: I-495 is a half beltway around Boston (the other half is the ocean), and it is 120 miles long.

That would make it the second-longest 3di, after I-476 (a spur that serves Scranton/Wilkes-Barre, Allentown and the western Philadelphia suburbs) which clocks in at 129 miles.

Only because I-476 ate PA 9 for lunch in 1996.

The I-495 in MA ate most of MA 25 during the 1980s.

Actually, I-495 was extended to I-195 in Wareham in 1975.  See http://commons.wikimedia.org/wiki/File:AASHTO_USRN_1975-06-17.pdf

[PHLBOS]

About long beltways: I-495 is a half beltway around Boston (the other half is the ocean), and it is 120 miles long.

That would make it the second-longest 3di, after I-476 (a spur that serves Scranton/Wilkes-Barre, Allentown and the western Philadelphia suburbs) which clocks in at 129 miles.

Only because I-476 ate PA 9 for lunch in 1996.

The I-495 in MA ate most of MA 25 during the 1980s.

Actually, I-495 was extended to I-195 in Wareham in 1975.  See http://commons.wikimedia.org/wiki/File:AASHTO_USRN_1975-06-17.pdf

Nonetheless, it still ate most of MA 25.  The I-495 extension between I-95 & MA 24 didn't become reality until 1982 and MA 25 was still signed between MA 24 & I-195 until 1984-85.

[mapman1071]

http://www.kurumi.com/roads/3di/long3di.html


    0.70 miles - I-878, New York. Not signed as an interstate.
    0.83 miles - I-315, Montana. Not signed as an interstate.
    1.06 miles - I-375, Michigan. The nation's (current) shortest signed interstate.
    1.09 miles - I-180, Wyoming. The only interstate that is not a freeway.
    1.12 miles - I-895, New York.
    1.20 miles - I-194, North Dakota.
    1.21 miles - I-587, New York.
    1.29 miles - I-395, Florida.
    1.34 miles - I-375, Florida.
    1.39 miles - I-115, Montana.
    1.40 miles - I-345, Texas.
    1.44 miles - I-175, Florida.
    1.49 miles - I-189, Vermont.
    1.50 miles - I-705, Washington State.
    1.57 miles - I-579, Pennsylvania. Was 1.30 miles in 1998.
    1.67 miles - I-381, Virginia. Was 1.17 miles in 1998; the official endpoint(s) changed.
    1.98 miles - I-395, Maryland. In 1998, this was the shortest signed interstate at 0.72 miles. But more recent federal highway logs consider I-395 to be nearly 2 miles long.

What about I-190 (SD)? 1.72 lovely miles.

i think Kurumi's link suffices

Yes. Yes it does.

I need to proof it, though... Texas I-110 (0.92 mi) should be there, for example.

How About I-478 (Unsigned) NY Brooklyn Battery Tunnel

[Mapmikey]

http://www.kurumi.com/roads/3di/long3di.html
    1.67 miles - I-381, Virginia. Was 1.17 miles in 1998; the official endpoint(s) changed.

From where to where?

Virginia took the VA 381 signage down quite some time ago, but when it still existed, the transition point was not the traffic light at Keys Street, but at a point north of there, in the curve near where Piedmont Avenue makes its 90-degree turn.

Given the existence of I-180 in Wyoming, there is precedent for designating and signing I-381 all the way to Lee Highway.

I-381 does end at Keys/Church St as shown in the picture below (photo credit, HB Elkins Aug 2003).  This is also where the VDOT traffic logs says it ends, and also where route logs back to at least 1979 (next oldest one I have is 1957) say it ends:



The traffic logs available on virginiadot.org show I-381's mileage change from 1.45 miles in 1985 to 1.67 miles in 1990 as it is today.

My suspicion is that it is the north end that has shifted slightly.  There have been 3 different interchanges at I-81/381 (including a left handed clover from 81 NB to 381 SB in the early 60s) and the footprint of the current one is a little different than the previous one.  The bridges on the current interchange are dated 1987.

Mapmikey

[hbelkins]

I-381 does end at Keys/Church St as shown in the picture below (photo credit, HB Elkins Aug 2003).  This is also where the VDOT traffic logs says it ends, and also where route logs back to at least 1979 (next oldest one I have is 1957) say it ends:

Not sure that sign is still there. Virginia replaced the cutouts at Commonwealth and Lee Highway sometime prior to 2003, and then the references to VA 381 were removed at a later date.