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AASHTO Route Numbering Database Documents

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formulanone:
Wow, great find!

In the year 2000, Alabama submitted their application to move US 29 over to I-85. The point-to-point mileage was submitted in what appears to be Comic Sans:



(Spoiler alert: Yes, it was approved.)

kurumi:
Well, there goes my evening :-)

Thank you Rover_0!

Mods, maybe we could pin this somehow as a good source of information?

Alex:

--- Quote from: kurumi on September 22, 2020, 10:28:22 PM ---Well, there goes my evening :-)

Thank you Rover_0!

Mods, maybe we could pin this somehow as a good source of information?

--- End quote ---

Done!

I will be digging into this some more, but not tonight as it will keep me up late!

One thing I found was a 1955 application by NC/SC to extend US 220 south from Rockingham along SC 381, SC 9, SC 57 and SC 41 to US 17 near Mt Pleasant via Dillon and Mullins.

kurumi:
We know that CT/MA I-395 was conceived as I-290 for a while, but this was new to me:


--- Quote ---Some previous correspondence has referred to the possibility of this Route being designated as Interstate 290; however, the State of Massachusetts feels that such a number would be misleading since it indicates a closed loop off I-90 under AASHTO guidelines. Although the proposed Interstate connects two major Interstate routes, FHWA off­icials in Washington were not receptive to a two digit number being used when the two states first approached them about designating route 52 as an Interstate highway. I-99 may be the only available two digit number which substantially meets AASHTO guidelines, but its use would require renumbering Connecticut 99 which traverses six towns in this state and is of considerable length. Connecticut would not accept this number.

--- End quote ---

Aw man CT, you could have renumbered CT 99 and had I-99. CT 99 is really only in 3 towns. You could have called it 299 and no one would shed a tear.

(And I-99 could have extended to Leominster and beyond...)

cl94:
Merry Christmas, everyone!

I found an early NY 3DI numbering plan. This has some stuff we never knew existed.

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