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)

[edit] History notes

SR 17 (only interchange details here)

• 1956 over Santa Cruz Avenue unchanged?
• 1957 under SR 9 unchanged?
• 1994 under Lark Avenue changed - was a north-facing half diamond?
• 1994 over SR 85 new interchange
• 1971 over Camden Avenue changed - was a diamond
• 1959 under Hamilton Avenue changed - southbound entrance added to southwest corner

April 30, 1959

• 1959 over Moorpark Avenue
• 1971 over I-280 new interchange
• 1963, 1971 under I-280 ramps
• 1959 under Stevens Creek Boulevard C/D roads added
• 1959 over Forest Avenue
• 1959 over Hedding Street
• 1959 over Bascom Avenue unchanged

?

• 1960 under Park Avenue
• 1960 under SR 82 unchanged
• 1992 over RR
• 2005 under Coleman Avenue changed - was a tight folded diamond in the northwest and northeast corners; later had a right turn in the southwest corner
• 1960 over Guadalupe River
• 2003 under SR 87
• 1960 over 1st Street unchanged
• 1960 over 4th Street
• 1997 over US 101 unchanged
• 1960 over Old Bayshore Highway unchanged

July 2, 1954

• 2001 over Brokaw Road changed - was a tight folded diamond in the northwest and southeast corners
• 1974 under Montague Expressway changed - was a tight folded diamond in the northwest and southeast corners
• 1995 under Tasman Drive new interchange
• 1972, 2001-05 under SR 237 changed - was a folded diamond in the northwest and southeast corners, later a full cloverleaf
• 2002 over Penitencia Creek
• 2002 under Dixon Landing Road new interchange - originally a folded diamond in the northwest and northeast corners
• 1952 over Scott Creek

November 24, 1958

• 1958 under SR 262 unchanged until recently
• 1958 over Agua Caliente Creek
• 1995 under Fremont Boulevard changed - was a diamond on the east side, a folded diamond in the southwest corner, and an extra loop in the northwest corner
• 1958 over Arroyo de la Laguna Creek
• 1994 under Auto Mall Parkway changed - was a diamond on the east side and two loops on the west side
• 1997 under Stevenson Boulevard new interchange - originally a folded diamond in the northeast and southwest corners
• 1994 under Mowry Avenue changed - was a diamond on the east side and a cloverleaf on the west side
• 1958, 1994 over Hetch Hetchy Aqueduct
• 1993 under Central Avenue
• 1958 under pipeline
• 1995 under RR
• 1997 under SR 84 east changed - was a diamond on the west side and a cloverleaf on the east side; later had a loop added to the southwest corner
• 1984 under SR 84 west unchanged
• 1958 over Crandall Creek
• 1981 under Paseo Padre Parkway

November 1957

• 1998 under Fremont Boulevard changed - was a complicated diamond/directional hybrid, with exit ramps splitting in the median of Fremont Boulevard and merging on the left of either direction, and entrance ramps coming off the right side, with a U-turn on Fremont Boulevard to turn left
• 1957 over Patterson Slough
• 1957 over Alameda Creek
• 1998 under Alvarado Niles Road changed - was a diamond with a loop in the southwest corner
• 1956, 1993 over Whipple Road changed - was a diamond on the east side and a folded diamond in the southwest corner
• 1957, 1993 over RR
• 1958 over Ward Creek
• 1968 under Industrial Parkway new interchange - originally a north-facing half diamond
• 1968 over Ward Creek
• 1958 under Tennyson Road C/D roads added
• 1957 under SR 92 unchanged

June 5, 1953

• 1968 under Winton Avenue changed - was a diamond with loops in the northwest and southeast corners, but already had collector roads, so maybe the cloverleaf was planned
• 1952 over A Street unchanged
• 1992 under Hacienda Avenue
• 1992 under Paseo Grande
• 1953, 1992 over San Lorenzo Creek
• 1991 over Hesperian Boulevard unchanged - except that the southbound entrance began further north on Hesperian Boulevard
• 1953 over Lewelling Boulevard unchanged
• 1978, 1991 under I-238 new interchange

June 13, 1952

• 1952, 1994 over I-238 unchanged
• 1952 under Washington Avenue unchanged
• 1951 over Ora Loma Ditch
• 1993 under Floresta Boulevard
• 1994 under Fairway Drive
• 1952 under Marina Boulevard changed - was a folded diamond in the northeast and southwest corners
• 1994 under Williams Street
• 1952 under SR 112 changed - was a tight distorted full cloverleaf
• 1951 over RR

June 1, 1950

• 1998 under 98th Avenue changed - was a tight folded diamond in the northeast and southwest corners
• 1976, 1996 under Hegenberger Road changed - was a tight folded diamond in the northwest and southeast corners, with a right turn in the northeast corner and a loop in the southwest corner
• 1948 over Elmhurst Creek
• 1948, 1968 over Damon Slough
• 1968 under 66th Avenue new interchange
• 1948 over East Creek Slough
• 1950 over High Street unchanged
• 1950, 1963 over SR 77 unchanged - except that the southbound exit was a left exit
• 1948 over Fruitvale Avenue unchanged - except that the northbound entrance didn't exist
• 1947 under 29th Avenue unchanged

July 1949

• 1947 under 23rd Avenue unchanged
• 1997 under 16th Avenue new interchange
• 1948 over 5th Avenue unchanged

June 11, 1957 - all or only the double-decker?

• 1953, 1958 over downtown C/D roads added - the first one, in 1958, appears to have been the northbound Broadway exit
• 1985 under I-980 new interchange - replaced south-facing half diamond at Jefferson Street
• Former interchanges:
  • North-facing half diamond at Market Street
  • South-facing half diamond at 7th-8th Streets near Kirkham Street
  • Right turn in the northeast corner and loop in the southwest corner at 14th Street, with frontage road access
  • North-facing half diamond at 32nd Street

July 23, 1997; September 30, 1998

• 1998 over downtown
• 1995 under BART
• 1997 over 7th Street
• 1995-1998 over Grand Avenue
• 1935, 1955 under I-580

--NE2 08:12, 16 January 2008 (UTC)