Changing Interstate Route Number Designation - Twice

[Fred Defender]

I'm sure that there are plenty of interstate segments nationwide that have had their route number designation changed. But are there any like the stretch of I-275 in Hillsborough/Pinellas Counties in Florida that have changed TWICE?

When the section between Malfunction Junction (present I-4/I-275 junction) in Tampa and 9th St in St. Petersburg opened, it was known as I-4. In the early-1970's, around the time that the extension to 54th Avenue N opened, it was known as I-75. By 1980, it had changed again, to I-275.

Where else has this been done?

[rickmastfan67]

Parkway West here in Pittsburgh.  Started out as I-70, then in 1963 it became I-79. Then in 1972, it became I-76, and then in 1973, it became I-279.  And finally, in 2009, it became I-376.
http://www.pahighways.com/interstates/I279.html

[CNGL-Leudimin]

I-84 to I-86 back to I-84 in CT and MA. If that counts.

[Rothman]

Weren't there some changes on the Knoxville interstate numbering over the years?

[noelbotevera]

Weren't there some changes on the Knoxville interstate numbering over the years?

Ehhh...only once. I-75 was I-275 up until 1982, when it became I-275.

[jp the roadgeek]

I-95 to I-895 back to I-95 in DE.  Also I-495 to I-95 to I-495.
Can we count US 6A to CT 66 to I-691 in Meriden, CT?  How about (planned) I-82 to I-84 to I-384 in CT?

[Jardine]

Loveland, Iowa to Avoca:

I-80

I-80N

I-680

[roadman65]

Philadelphia:

I-680 to I-676 to I-76 (The Lower Schuykill Expressway)

I-80S to I-76 to I-676 (Vine Street Expressway)

[Jardine]

Addenda:

WIKI does not concur with my recollection of the current I-680 in Iowa having ever been signed I-80, instead, always having been designated I-80N from the get go.

Hell to get old I suppose, but I was pretty sure it wasn't I-80N until the diagonal segment from Avoca to Council Bluffs was completed some years later and took the I-80 designation at that time, and then for a few years it was I-80N till I-680 was completed.

I'll do some more checking . . .

[Revive 755]

In Missouri, I-255 east of I-55 was changed from I-255 to I-270 around 1974, then back to I-255 around 1984.

[Alps]

North of Trenton: I-295 (US 1 to planned Somerset Freeway), I-95, then a mix of I-195, I-295, I-395 before finally settling on extending 295.

[Jardine]

Poo.

Really looks like from day one that section of interstate was tagged I-80N, they were aware the eventual I-80  alignment would pass that segment and signed according;y till it was rechristened i-680.

[froggie]

Really looks like from day one that section of interstate was tagged I-80N, they were aware the eventual I-80  alignment would pass that segment and signed according;y till it was rechristened i-680.

Correct.  The 1965 IA map explicitly labels the northern leg as I-80N, before either leg was constructed.  Both legs are shown as proposed on the 1960 IA map.

[vtk]

Parkway West here in Pittsburgh.  Started out as I-70,

Is there a map somewhere showing how I-70 was originally supposed to go from Ohio through Pittsburgh and on east?

[jwolfer]

North of Trenton: I-295 (US 1 to planned Somerset Freeway), I-95, then a mix of I-195, I-295, I-395 before finally settling on extending 295.

If was never signed as 195 or 395

[leroys73]

In Missouri, I-255 east of I-55 was changed from I-255 to I-270 around 1974, then back to I-255 around 1984.

I am glad you mentioned that.  I thought my cave man mind was just confused.   I have been making trips through St. Louis since before the interstates were finished.  I remember the change in the 70s as it messed me up then.  But in the 80s I skipped several years of St. Louis. Then back through there several times in the  90s and beyond. I thought my mind was gone.  I thought I was suppose to be on I-270 but it was now I-255.  

Wow, thank you. 

[MikeTheActuary]

In Memphis, sometime in the future, you could have I-255 » I-240 » I-69

[rickmastfan67]

Parkway West here in Pittsburgh.  Started out as I-70,

Is there a map somewhere showing how I-70 was originally supposed to go from Ohio through Pittsburgh and on east?

Beats me to be honest.  That might be a question for PAHighways.

[english si]

I-79 - I-376 - I-76 in today's numbering (hopefully link should work). I-70 between Washington and New Stanton was I-70S, as can be seen here.

[bzakharin]

Was I-276 in eastern PA ever signed as I-280 or did it not make it out of proposal stage? If it was, then the impending I-95 interchange will mark the third change for the PA Turnpike east of that interchange, to I-95.

[silverback1065]

that's weird, why doesn't 70 go through Pittsburgh anymore? 

[mapman1071]

Queens  I-78 to I-878 to NY 878

[vtk]

that's weird, why doesn't 70 go through Pittsburgh anymore?

Same reason I-79 doesn't. Same reason I-75 doesn't go through Tampa or St Petersburg. There should be more examples of this, IMO.

[TheStranger]

Devore, CA to Colton, CA:

I-15 (1956 to 1969)
I-15E (1969 to 1982)
I-215 (1982 to present)

---

Smaller examples in California:

Sacramento:
Beltline Freeway through Natomas - I-880 1968-1982, I-80 1982-present
downtown/midtown/Arden route (Capital City Freeway) - I-80 approximately 1968-1982, unsigned I-305 between US 50/I-80 junction in West Sacramento and E Street from 1982-present

San Francisco Bay Area:
Nimitz Freeway between US 101 in San Jose and Route 262 in Fremont: I-680 mid-1960s, I-880 1984-present
former Route 17 south of US 101 in San Jose: I-280 mid-1960s, I-880 1984-present

MacArthur Freeway (former US 50) in Oakland: I-5W 1956-1964, I-580 1964-present

Vallejo to Benicia: I-680 from 1956-1976, I-780 1976-present

[Henry]

Eastern half of Capital Beltway:
I-495, 1964-1977
I-95, 1977-1989
I-95/I-495, 1989-now