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Interstate 2 has never existed, although there is an Interstate H-2 on the island of Oahu in Hawaii.

I-102 is an early California proposed number inconsistent with the interstate highway numbering convention.

I-102 (preliminary numbering)  California (link)

On April 1, 1958, California submitted to AASHO a numbering plan for its proposed interstates, including 3-digit spurs numbered in the low 100s and not associated with their parent interstates. Interstate 102 was the proposed number for what is now I-210. [1note]

This number was not compliant with AASHO's numbering convention and was rejected.

On August 7, 1958, California had bought in to the system and submitted I-210, as the highway started at I-10 and connected with another interstate. This was approved on Nov. 10, 1958. [2note]

(In 1957, Interstate 210 had been previously proposed as I-12, then as I-14.) [1note]

See also:


  1. Summers, Stephen. "Interstate system route numbering." http://www.nwindianahwys.homestead.com/INTER_MAIN.HTML. (29 May 2003)
  2. Faigin, Daniel. "California Highways (www.cahighways.org): Interstate Highway Types and Interstate History." http://www.cahighways.org/itypes.html (29 May 2003)