Talk:Interstate 880

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[edit] History including parallel routes

Pre-1964 Legislative Route 5
  • Defined 1909, Santa Cruz to Oakland via present Route 17 into San Jose, Oakland Road, Milpitas Boulevard, Mission Boulevard, Foothill Boulevard (maybe originally via SR 185? even earlier via Hesperian Boulevard?)
  • Eventually extended to east end of Bay Bridge
  • Pre-1964 Legislative Route 239 extended in 1961 to include former LR 5 (I-880) between I-280 and US 101 (Bypass); LR 5 moved along I-280 and US 101
Pre-1964 Legislative Route 7
  • Defined 1909, Benicia to Tehama via present I-680, I-80, etc
  • Redefined at some point, Albany to Tehama via present I-80, etc
Pre-1964 Legislative Route 14
  • Defined 1909, Albany to Martinez via present SR 123, I-80 and Pomona Street? or maybe SR 4?
  • Redefined by 1959, Oakland to Richmond via present SR 123
Pre-1964 Legislative Route 69
  • Defined 1923?, Oakland to Albany? or Richmond-San Rafael Bridge? via present I-80 and I-580?
  • Extended 1933 to US 101 in San Jose via present I-880
Pre-1964 Legislative Route 105
  • Defined 1933, Half Moon Bay to Oakland via present SR 92 and SR 185 (possibly a former LR 5 alignment north of Hayward)
State Route 9
  • Signed 1934, Santa Cruz to Hayward via present etc, SR 237 (LR 113), I-880 (LR 69), SR 262 (LR 69 spur and LR 5), Mission Boulevard (LR 5), SR 238 (LR 5)
  • 1942 map doesn't show it in Hayward
  • Truncated 1964 to form etc, SR 237, SR 17, SR 238? (SR 262 was defined in 1965), SR 238
State Route 17
  • Signed 1934 as SR 13, Santa Cruz to San Rafael via present SR 17 (LR 5), Oakland Road-Milpitas Boulevard (LR 5 - later moved to I-880/LR 69), I-880 (LR 69) and I-580 (LR 69)
  • Renumbered SR 17 in mid-to-late 1930s?
  • Part in San Jose became LR 239 in 1961
  • [note: was to have extended to SR 1 from San Rafael, but I don't care about that here]
  • Truncated 1984 to I-280, rest became I-880 and I-580
State Route 21
  • Signed by 1942, Warm Springs to Valona via present Mission Boulevard (LR 5), I-680 (LR 108, LR 107), Pomona Street (LR 14?) and Benicia to Cordelia via present I-680 (LR 74) (full route from on 1953 map)
  • Extended south on LR 5 to US 101 when SR 17 moved to LR 69? not on 1955 map, and not shown clearly on 1963 map
  • Renumbered I-680 in 1964 (some changes at the north end - don't care much now)
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