California State Route 71

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State Route 71 marker

State Route 71
Chino Valley Freeway
Route information
Defined by S&HC § 371
Maintained by Caltrans
Length: 16 mi[1] (26 km)
Existed: 1934 – present
Major junctions
South end: SR 91 in Corona
  SR 142 in Chino Hills
SR 60 in Pomona
North end: I‑10 / SR 57 in San Dimas
Highway system
SR 70 SR 72

State Route 71 (SR 71) is the Chino Valley Freeway, formerly the Corona Expressway and before then the Temescal Freeway, a freeway/highway of about 15 miles (24 km) in length located entirely within Southern California, United States. Contrary to its name, this highway is a limited-access freeway in San Bernardino and Riverside counties; in Los Angeles County it is only an expressway.

Route description[edit]

This route is part of the California Freeway and Expressway System[2] and is eligible for the State Scenic Highway System.[3] However, it is not designated as a scenic highway by Caltrans.[4] Other names of this highway include the "Police Officer Daniel T. Fraembs Memorial Highway" (Route 71 in the City of Pomona),[5] and the "Mayor James Thalman and Mayor Michael Wickman Memorial Highway" (Route 71 between Soquel Canyon Parkway & Pine Avenue in Chino Hills).[6]

Beginning at its northern terminus at the Kellogg Interchange complex in San Dimas to a short distance south of Mission Boulevard in Pomona, it is a four-lane freeway. From that point and through most of Pomona, it is a four-lane expressway with at-grade intersections with other, 'regular' streets. All are signalized except for Phillips Drive. Just north of the Rio Rancho Road exit, all aspects of the highway 'upgrade' to freeway standards in its alignment, lane width, pavement, barriers, access, etc. The freeway portion of the route ends at the San Bernardino/Riverside County line, where it reverts to a divided four-lane expressway to its terminus at its junction with the Riverside Freeway (SR 91) in Corona.

The section of highway between Chino and Corona is notorious for thick winter fogs at dawn and dusk, resulting in many automobile collisions when drivers fail to slow down despite reduced visibility. Residents of Los Serranos (now Chino Hills) recall being awakened by sounds of crinkling bumpers, fenders and headlights.

As this freeway/expressway serves as an important diagonally aligned (northwest-southeast) commuter traffic corridor between the cities in the Pomona Valley (eastern Los Angeles County) and the cities of western Riverside County, it is heavily travelled and is used as an alternative to the Orange Freeway, State Route 57 (SR 57) located to the west and the Ontario Freeway, Interstate 15 (I-15) located to the east.


The original routing of Route 71 according to the 1934 listing was from U.S. 80, now Interstate 8, in San Diego north to U.S. Route 66, now State Route 66, near Claremont via Elsinore and Temecula.[7] The early section of Chino Valley Freeway was made in 1971 from Kellogg Interchange to Pomona Freeway. The section from SR 60 to Riverside Freeway was completed in March 1998.


Mission 71 Project[edit]

In September 2008, construction began on the Mission 71 Project, in which Route 71's intersection at Mission Boulevard in Pomona was reconstructed into a grade-separated, diamond-designed interchange. A bridge was constructed to allow Mission to pass over Route 71, which now has entrance and exit ramps to Mission.[8] The freeway was extended south to the current four-way intersection at Ninth Street, where it resumes expressway status to the intersection with Old Pomona Road. The construction project was completed in Fall 2011.

Major intersections[edit]

Except where prefixed with a letter, postmiles were measured on the road as it was in 1964, and do not necessarily reflect current mileage. R reflects a realignment in the route since then.[9] The numbers reset at county lines; the start and end postmiles in each county are given in the county column.

County Location Postmile
Destinations Notes
RIV R3.03-R0.00
Corona R3.03 SR 91 (Riverside Freeway) – Riverside, Beach Cities Interchange; southbound exit and northbound entrance; south end of SR 71
San Bernardino
SBD R8.48-R0.00
Chino Hills   South end of freeway
R7.98 4 SR 83 north (Euclid Avenue) / Butterfield Ranch Road
R6.52 5 Pine Avenue
R4.89 7 Soquel Canyon Parkway, Central Avenue
ChinoChino Hills line R3.35 8 SR 142 west (Chino Hills Parkway) / Ramona Avenue
R1.82 10 Grand Avenue, Edison Avenue
R0.91 11 Chino Avenue Signed as exit 11A southbound
Chino Hills R0.09 12A Riverside Drive, Peyton Drive Signed as exit 11B southbound; no southbound entrance
Los Angeles
LA R4.70-R0.34
Pomona R4.31 12B SR 60 west (Pomona Freeway) – Los Angeles Southbound exit is via exit 13
R4.31 12 SR 60 east (Pomona Freeway) – Riverside Northbound exit is via exit 12A
R3.61 13 Rio Rancho Road
  North end of freeway
1.92 Ninth Street Closed; former at-grade intersection
  South end of freeway
1.62 14B Mission BoulevardPomona, Riverside, Brea, Fullerton Former US 60
1.24 Pomona Boulevard Closed
R1.48 14A I-10 (CA).svg Holt Avenue, Valley Boulevard (I-10 Bus. east) to I-10 east – San Bernardino South end of I-10 Bus. overlap; former US 99 south
R0.34 15 I‑10 west (San Bernardino Freeway) – Los Angeles North Closed
San Dimas R0.34 SR 57 north (Orange Freeway) to I‑210 Northbound exit and southbound entrance; north end of SR 71; former I-210 west
1.000 mi = 1.609 km; 1.000 km = 0.621 mi


External links[edit]

Route map: Google / Bing