While most U.S. Routes were in theory truncated in 1964, many remained until the Interstates were finished. Reliable sources are really needed for most of this.

US 6
  • 1964: truncated to Bishop
US 40
  • 1966: eliminated
US 50
  • 1971: truncated to Oakland
  • 1972: truncated to Manteca
  • 1973: truncated to Sacramento
US 60
  • 1966: truncated to Pomona
  • 1969: eliminated
US 66
  • 1964: truncated to Pasadena
  • 1974: eliminated
US 70
  • 1964: eliminated
US 80
  • 1973: eliminated
US 91
  • 1964: truncated to Barstow
  • 1973: eliminated
US 99
  • 1964: truncated to Los Angeles
  • 1966: truncated to Sacramento
  • 1969: eliminated
US 101
  • 1966: truncated to Los Angeles
US 299
  • 1964: eliminated
US 399
  • 1964: eliminated
US 466
  • 1964: truncated to Baker (why?)
  • 1969: eliminated