San Diego County, CA

1,707 public highway bridges

San Diego County Bridge Snapshot

San Diego County, California contains 1,707 public highway bridges in the FHWA National Bridge Inventory. Roughly 29.5% are rated “Good,” 20% “Fair,” 1.6% “Poor,” and 1.6% are classified as structurally deficient — the federal designation for spans whose deck, superstructure, or substructure has been rated 4 or below on the 0–9 NBI scale. Structurally deficient does not mean unsafe to cross; it means the bridge is on the priority list for repair or replacement.

Inspections in CA are conducted by certified engineers from the state Department of Transportation on a 24-month cycle, and results are reported back to the FHWA each spring. The list below shows every NBI-tracked bridge in the county, sorted by inventory load rating. Use the “Sort by” controls to surface the lowest-rated spans first, and click any row for full inspection history, traffic counts, and condition trends.

Source: FHWA National Bridge Inventory. See methodology for full definitions.

1,707

Total Bridges

29.5%

Good

1.6%

Poor

1.6%

Structurally Deficient

Condition Distribution

Good

29.5% (504)

Fair

20% (341)

Poor

1.6% (27)

SD

1.6% (27)

All Bridges (1,707)

Sort:

UNIVERSITY AVENUE

Over: STATE ROUTE 163

11-SD-163-2.61-SD, San Diego, CA

Built 1947 ADT: 95,000

MAIN STREET

Over: INTERSTATE 5

11-SD-005-5.40-SD, San Diego, CA

Built 1973 ADT: 154,000

SDIV RR

Over: STATE ROUTE 94

11-SD-094-46.79, San Diego, CA

Built 1915 ADT: 1,950

SDIV RR

Over: STATE ROUTE 94

11-SD-094-R59.16, San Diego, CA

Built 1917 ADT: 1,950

INTERSTATE 5

Over: NCTD, BNSF, OCEANSIDE BL

11-SD-005-R52.30-OCN, San Diego, CA

Built 1953 ADT: 31,400

STATE ROUTE 163

Over: SAN DIEGO RIVER

11-SD-163-3.95-SD, San Diego, CA

Built 1946 ADT: 17,300

E&W8-N163 CONNECT

Over: CAMINO DE LA REINA,SD RI

11-SD-008-2.43-SD, San Diego, CA

Built 1970 ADT: 17,300

STATE ROUTE 78

Over: MISSION RD,NCTD,BNSF RY

11-SD-078-14.99-SMCS, San Diego, CA

Built 1962 ADT: 18,300

STATE ROUTE 75

Over: INTERSTATE 5

11-SD-075-8.98-SD, San Diego, CA

Built 1973 ADT: 154,000

FIRST AVE

Over: INTERSTATE 5

11-SD-005-R16.59-SD, San Diego, CA

Built 1962 ADT: 156,000

N163-QUINCE ST OFF

Over: STATE ROUTE 163

11-SD-163-1.62-SD, San Diego, CA

Built 1946 ADT: 118,000

RICHMOND ST-SR163

Over: STATE ROUTE 163

11-SD-163-1.80-SD, San Diego, CA

Built 1947 ADT: 107,000

PEDESTRIAN WALKWAY

Over: STATE ROUTE 163

11-SD-163-2.07-SD, San Diego, CA

Built 1947 ADT: 105,000

ROBINSON AVENUE

Over: STATE ROUTE 163

11-SD-163-2.49-SD, San Diego, CA

Built 1942 ADT: 116,000

WASHINGTON STREET

Over: STATE ROUTE 163

11-SD-163-2.75-SD, San Diego, CA

Built 1942 ADT: 130,000

WASHINGTON ST-S163

Over: STATE ROUTE 163

11-SD-163-2.79-SD, San Diego, CA

Built 1947 ADT: 97,000

STATE ROUTE 163

Over: 6TH AVE-N163 ON RAMP

11-SD-163-2.98-SD, San Diego, CA

Built 1947 ADT: 15,300

E8-N163 & S163-E8

Over: STATE ROUTE 163

11-SD-008-2.41-SD, San Diego, CA

Built 1988 ADT: 167,000

SECOND AVE

Over: ROUTE 5

11-SD-005-R16.53-SD, San Diego, CA

Built 1962 ADT: 199,000

N163-W8 CONNECTOR

Over: RTE 163, S163-W8,N163-W8

11-SD-163-3.81-SD, San Diego, CA

Built 1991 ADT: 15,900

INTERSTATE 5

Over: CANNON ROAD

11-SD-005-R47.98-CBD, San Diego, CA

Built 1971 ADT: 6,050

E STREET

Over: INTERSTATE 5

11-SD-005-8.56-CHV, San Diego, CA

Built 1973 ADT: 163,000

INTERSTATE 5 SB

Over: 24TH STREET

11-SD-005-R10.04-NATC, San Diego, CA

Built 1965 ADT: 3,790

INTERSTATE 5 NB

Over: 24TH STREET

11-SD-005-R10.04-NATC, San Diego, CA

Built 1965 ADT: 3,790

INTERSTATE 5 SB

Over: 18TH STREET

11-SD-005-R10.43-NATC, San Diego, CA

Built 1965 ADT: 13,200

INTERSTATE 5 NB

Over: 18TH STREET

11-SD-005-R10.43-NATC, San Diego, CA

Built 1951 ADT: 13,200

H STREET

Over: INTERSTATE 5

11-SD-005-7.81-CHV, San Diego, CA

Built 1973 ADT: 159,000

DAIRY MART RD

Over: INTERSTATE 5

11-SD-005-2.31-SD, San Diego, CA

Built 1973 ADT: 40,000

IRIS STREET

Over: INTERSTATE 5

11-SD-005-3.40-SD, San Diego, CA

Built 1973 ADT: 117,000

CORONADO AVE

Over: INTERSTATE 5

11-SD-005-4.04-SD, San Diego, CA

Built 1973 ADT: 117,000

MISSION AVENUE

Over: INTERSTATE 5

11-SD-005-R53.21-OCN, San Diego, CA

Built 1971 ADT: 184,000

CALIFORNIA ST

Over: INTERSTATE 5

11-SD-005-R51.85-OCN, San Diego, CA

Built 1971 ADT: 203,000

CASSIDY ST

Over: INTERSTATE 5

11-SD-005-R51.47-OCN, San Diego, CA

Built 1971 ADT: 203,000

STATE ROUTE 78

Over: INTERSTATE 5

11-SD-078-0.01-OCN, San Diego, CA

Built 1971 ADT: 201,000

JEFFERSON ST

Over: ROUTE 5

11-SD-005-R50.86-CBD, San Diego, CA

Built 1970 ADT: 203,000

LAS FLORES DR

Over: ROUTE 5

11-SD-005-R50.68-CBD, San Diego, CA

Built 1971 ADT: 203,000

INTERSTATE 5

Over: CARLSBAD VILLAGE DR

11-SD-005-R50.11-CBD, San Diego, CA

Built 1971 ADT: 17,800

INTERSTATE 5

Over: CHESTNUT AVE

11-SD-005-R49.73-CBD, San Diego, CA

Built 1971 ADT: 5,470

TAMARACK AVENUE

Over: INTERSTATE 5

11-SD-005-R49.28-CBD, San Diego, CA

Built 1971 ADT: 203,000

STATE ROUTE 94 WB

Over: INTERSTATE 15

11-SD-094-3.17-SD, San Diego, CA

Built 1959 ADT: 113,000

STATE ROUTE 94 EB

Over: INTERSTATE 15

11-SD-094-3.17-SD, San Diego, CA

Built 1951 ADT: 123,000

INTERSTATE 5

Over: DE ANZA OFF-RAMP

11-SD-005-R22.88-SD, San Diego, CA

Built 1954 ADT: 21,300

INTERSTATE 5

Over: DE ANZA OFF RAMP

11-SD-005-R22.87-SD, San Diego, CA

Built 1969 ADT: 21,300

INTERSTATE 5

Over: BALBOA AVE

11-SD-005-R23.49-SD, San Diego, CA

Built 1954 ADT: 18,300

PEDESTRIAN WALKWAY

Over: INTERSTATE 5

11-SD-005-R1.00-SD, San Diego, CA

Built 1973 ADT: 40,000

HOME AVENUE

Over: STATE ROUTE 94

11-SD-094-3.62-SD, San Diego, CA

Built 1990 ADT: 144,000

47TH STREET

Over: STATE ROUTE 94

11-SD-094-4.63-SD, San Diego, CA

Built 1973 ADT: 184,000

EUCLID AVENUE

Over: STATE ROUTE 94

11-SD-094-5.14-SD, San Diego, CA

Built 1957 ADT: 183,000

KELTON ROAD

Over: STATE ROUTE 94

11-SD-094-5.79-SD, San Diego, CA

Built 1956 ADT: 167,000

NOBEL DRIVE

Over: INTERSTATE 5

11-SD-005-R28.16-SD, San Diego, CA

Built 1966 ADT: 160,000

Read our methodology — how this data is sourced, computed, and verified.

Related

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Data sourced from official U.S. government datasets. See our methodology for details. Retrieved and formatted by PlainBridges Editorial

Reviewed byPlainbridges Editorial, Plain Bridges Editorial Team · June 5, 2026