Los Angeles County, CA

3,937 public highway bridges

Los Angeles County Bridge Snapshot

Los Angeles County, California contains 3,937 public highway bridges in the FHWA National Bridge Inventory. Roughly 34.3% are rated “Good,” 17.1% “Fair,” 2.2% “Poor,” and 2.2% 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.

3,937

Total Bridges

34.3%

Good

2.2%

Poor

2.2%

Structurally Deficient

Condition Distribution

Good

34.3% (1,350)

Fair

17.1% (675)

Poor

2.2% (88)

SD

2.2% (88)

All Bridges (3,937)

Sort:

INTERSTATE 605

Over: ROSECRANS AVE

07-LA-605-R6.81-NRW, Los Angeles, CA

Built 1966 ADT: 3,350

INTERSTATE 605

Over: IMPERIAL HIGHWAY

07-LA-605-R7.85-NRW, Los Angeles, CA

Built 1966 ADT: 23,000

IMPERIAL-S605 RMP

Over: IMPERIAL HIGHWAY

07-LA-605-R7.85-NRW, Los Angeles, CA

Built 1993 ADT: 24,200

N605-FIRESTONE BLD

Over: IMPERIAL HWY, ON-RAMP

07-LA-605-R7.84-NRW, Los Angeles, CA

Built 1993 ADT: 2,400

INTERSTATE 605

Over: FIRESTONE BLVD

07-LA-605-R8.38-NRW, Los Angeles, CA

Built 1966 ADT: 34,000

N605-FIRESTONE RMP

Over: FIRESTONE BLVD

07-LA-605-R8.37-NRW, Los Angeles, CA

Built 1993 ADT: 34,000

INTERSTATE 605

Over: CECILIA STREET

07-LA-605-R8.91-NRW, Los Angeles, CA

Built 1966 ADT: 1,000

N605-N5&S5 CONN

Over: STUDEBAKER RD-N605 ON-RP

07-LA-605-R9.22-DNY, Los Angeles, CA

Built 1965 ADT: 2,500

INTERSTATE 605

Over: FLORENCE AVE

07-LA-605-R9.35-DNY, Los Angeles, CA

Built 1965 ADT: 33,000

N605-S5 CONNECTOR

Over: FLORENCE AVE

07-LA-605-R9.35-DNY, Los Angeles, CA

Built 1965 ADT: 33,000

N605-N5 CONNECTOR

Over: ROUTE 5

07-LA-605-R9.52-SFSP, Los Angeles, CA

Built 1965 ADT: 186,000

FLORENCE-N5 ON RMP

Over: N5-N&S605 CONNECTOR RAMP

07-LA-005-6.65-SFSP, Los Angeles, CA

Built 1965 ADT: 22,950

S605-FLORENCE OFRP

Over: S5-N&S605 CONN

07-LA-605-R9.54-DNY, Los Angeles, CA

Built 1965 ADT: 230,000

INTERSTATE 605

Over: I 5 & CONNECTOR RAMPS

07-LA-605-R9.55-SFSP, Los Angeles, CA

Built 1965 ADT: 22,700

INTERSTATE 605

Over: TELEGRAPH RD

07-LA-605-R10.25-SFSP, Los Angeles, CA

Built 1965 ADT: 2,400

INTERSTATE 605

Over: SLAUSON AVE

07-LA-605-R11.54-SFSP, Los Angeles, CA

Built 1965 ADT: 38,000

INTERSTATE 605

Over: WASHINGTON BLVD

07-LA-605-R12.05-SFSP, Los Angeles, CA

Built 1965 ADT: 36,000

INTERSTATE 605

Over: SARAGOSA STREET

07-LA-605-R12.41-SFSP, Los Angeles, CA

Built 1965 ADT: 14,000

INTERSTATE 605

Over: DUNLAP CROSSING ROAD

07-LA-605-R12.85-SFSP, Los Angeles, CA

Built 1965 ADT: 1,250

INTERSTATE 605

Over: BEXLEY DR

07-LA-605-R13.18-SFSP, Los Angeles, CA

Built 1965 ADT: 3,100

ROUTE 170

Over: VANOWEN STREET

07-LA-170-R17.75-LA, Los Angeles, CA

Built 1968 ADT: 5,000

UPRR,AMTRAK,METRO

Over: STATE ROUTE 170

07-LA-170-R18.40-LA, Los Angeles, CA

Built 1968 ADT: 184,000

STATE ROUTE 170

Over: ROSCOE BLVD

07-LA-170-R19.72-LA, Los Angeles, CA

Built 1968 ADT: 5,000

ROUTE 170

Over: STRATHERN STREET

07-LA-170-R19.30-LA, Los Angeles, CA

Built 1968 ADT: 5,000

SHERMAN WAY OC

Over: ROUTE 170

07-LA-170-R18.27-LA, Los Angeles, CA

Built 1968 ADT: 206,000

PALO COMADO CYN RD

Over: ROUTE 101

07-LA-101-33.69-AGRH, Los Angeles, CA

Built 1963 ADT: 185,000

PARKWAY CALABASAS

Over: US 101

07-LA-101-28.29-LA, Los Angeles, CA

Built 1965 ADT: 196,000

MUREAU RD

Over: ROUTE 101

07-LA-101-29.06, Los Angeles, CA

Built 1965 ADT: 196,000

RAMP/CONNECTOR 170

Over: SHERMAN WY N170 ON-RAMP

07-LA-170-R18.16-LA, Los Angeles, CA

Built 1968 ADT: 3,000

STATE ROUTE 170

Over: BURBANK BLVD

07-LA-170-R15.99-LA, Los Angeles, CA

Built 1966 ADT: 8,500

STATE ROUTE 170

Over: LAUREL CANYON BLVD

07-LA-170-R16.77-LA, Los Angeles, CA

Built 1966 ADT: 14,000

STATE ROUTE 170

Over: VICTORY BLVD

07-LA-170-R17.25-LA, Los Angeles, CA

Built 1966 ADT: 5,000

STATE ROUTE 170

Over: VICTORY BLVD

07-LA-170-R17.25-LA, Los Angeles, CA

Built 1966 ADT: 5,000

STATE ROUTE 170

Over: VICTORY BLVD

07-LA-170-R17.25-LA, Los Angeles, CA

Built 1966 ADT: 5,000

INTERSTATE 5

Over: RYE CANYON ROAD

07-LA-005-R54.17-SCTA, Los Angeles, CA

Built 1964 ADT: 12,012

HART STREET POC

Over: STATE ROUTE 170

07-LA-170-R18.02-LA, Los Angeles, CA

Built 1968 ADT: 184,000

STATE ROUTE 60

Over: FINDLAY AVE

07-LA-060-R5.16-MTBL, Los Angeles, CA

Built 1967 ADT: 5,100

STATE ROUTE 60

Over: WILCOX AVENUE

07-LA-060-R5.89-MTBL, Los Angeles, CA

Built 1967 ADT: 19,000

ROUTE 60

Over: GARFIELD AVE

07-LA-060-R5.60-MTBL, Los Angeles, CA

Built 1967 ADT: 29,250

STATE ROUTE 60

Over: ATLANTIC BLVD

07-LA-060-R4.43-MONP, Los Angeles, CA

Built 1967 ADT: 41,746

STATE ROUTE 60

Over: POMONA BLVD

07-LA-060-R4.68-MONP, Los Angeles, CA

Built 1967 ADT: 5,448

VICTORY BL-N170 ON

Over: N170-VICTORY BL OFF-RAMP

07-LA-170-R17.13-LA, Los Angeles, CA

Built 1966 ADT: 1,500

VICTORY BL-S170 ON

Over: S170-VICTORY BL OFF-RAMP

07-LA-170-R17.33-LA, Los Angeles, CA

Built 1966 ADT: 3,000

BNSF, SCRRA METRO

Over: S710-W10 CONNECTOR RAMP

07-LA-710-R26.59-MONP, Los Angeles, CA

Built 1974 ADT: 60,000

E91-N605 CONNECTOR

Over: 605 & W91-S605 CONN

07-LA-091-R16.97-CRTS, Los Angeles, CA

Built 1966 ADT: 28,010

STATE ROUTE 91

Over: SR 605 & RAMPS

07-LA-091-R16.90-CRTS, Los Angeles, CA

Built 1966 ADT: 28,000

W91-S605 CONNECTOR

Over: ROUTE 605

07-LA-091-R16.93-CRTS, Los Angeles, CA

Built 1966 ADT: 30,670

STATE ROUTE 91

Over: STUDEBAKER ROAD

07-LA-091-R17.08-CRTS, Los Angeles, CA

Built 1968 ADT: 27,500

W91-N&S605 CONN

Over: STUDEBAKER ROAD

07-LA-091-R17.09-CRTS, Los Angeles, CA

Built 1968 ADT: 27,000

HELLMAN AVE

Over: INTERSTATE 710

07-LA-710-R27.11-LA, Los Angeles, CA

Built 1965 ADT: 45,500

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 6, 2026