3 Digit Interstate Spur Route #s

[Beltway]

We ever going to get 4 digit interstates?

A 4-character Interstate exists -- I-H201

[hotdogPi]

alpsroads

[Roadgeekteen]

alpsroads

Interstate interstate 195

[vdeane]

We ever going to get 4 digit interstates?

A 4-character Interstate exists -- I-H201

I would consider the H to be a prefix, not a digit, so I-H201 would be every bit a 3di as I-35E is a 2di.

[Beltway]

We ever going to get 4 digit interstates?

A 4-character Interstate exists -- I-H201

I would consider the H to be a prefix, not a digit, so I-H201 would be every bit a 3di as I-35E is a 2di.

That is why I wrote '4-character' and not '4-digit'.

I-35E and I-35W are a grey area, as neither is really a mainline Interstate.

[frankenroad]

I think in Ohio, it has more to do with order of assignment, than geography.   I-275 and I-475 existed before I-675 was built, even though 675 falls between 275 and 475.

Same with 270, 470, and 670.  270 and 670 actually intersect, whereas 470 is over 100 miles further east.

[Flint1979]

I think in Ohio, it has more to do with order of assignment, than geography.   I-275 and I-475 existed before I-675 was built, even though 675 falls between 275 and 475.

Same with 270, 470, and 670.  270 and 670 actually intersect, whereas 470 is over 100 miles further east.

Makes sense because I-275 and 475 were built with I-75. I think they had to do some rerouting of I-675 it was suppose to rejoin I-75 north of downtown Dayton.

[bing101]

Sarcastically speaking: a 1xx route is a duplicate of a state route, 3xx actually gets used, 5xx gets cancelled, 7xx is either pointless or in development hell, and 9xx will never happen in our lifetimes.

(Except for Georgia and California, but the latter will never build another interstate route.)

Well CA-210 from Glendora to Redlands was waiting to get the I-210 designation for nearly 20 years though .

[ozarkman417]

Arkansas has three spur routes of Interstates, though there is only one per 2di (excluding I-49).
What is odd about AR's case is that they all end in 5, one being I-555, the only (signed) 3di with three of the same number.

[sparker]

This gets to an issue I've brought up before.  I think Tacoma's I-705 is so named because it begins and ends at Washington SR-7, but someone keeps saying it's a coincidence.  The only reason it could be a coincidence is if Washington is reserving numbers for three more spur Interstates south of Tacoma.

IMO, it's certainly not a coincidence.  The number actually pulls "double duty" within WA -- it functions as a continuation of WA 7 and, with the state's "subsidiary" number methodology, also serves as a "branch" of that same state highway -- like WA 702 and WA 706. 

[Hwy 61 Revisited]

There's also I-480N in Metro Cleveland.

[hotdogPi]

There's also I-480N in Metro Cleveland.

And I-984J in Metro New York. (Photo by formulanone)

[sprjus4]

I-270Y in Maryland - Interstate 270 "Spur" connecting I-270 to I-495 (Capital Beltway) South.

[NWI_Irish96]

alpsroads

Interstate interstate 195

Is that the interstate you take to get to the NIT Tournament?