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Wikipedia:WikiProject U.S. Roads/California/History/Temporary signage of Interstates

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Until many Interstates were completed, the old alignments that had that legislative number were signed as a different route:

I-5
  • US 101, Mexico to Los Angeles
  • US 99, San Fernando to Wheeler Ridge
  • US 50, Mossdale to Stockton
  • US 99W, Woodland to Red Bluff
  • US 99, Red Bluff to Oregon
I-105
I-205
I-505
  • Apparently signed as I-505 despite not being a freeway
I-605
I-8
I-10
  • US 60, Beaumont to Arizona
I-210
  • Nothing, Newhall Pass to San Fernando
  • SR 118, San Fernando to Pasadena
  • SR 134 in Pasadena?
  • US 66, Pasadena to Glendora
I-15
  • US 66, San Bernardino to Barstow
  • US 91, Barstow to Nevada
I-40
I-80
I-580
I-680
  • SR 238, San Jose to Mission San Jose
  • SR 21, Mission San Jose to Cordelia