San Francisco County, CA

170 public highway bridges

San Francisco County Bridge Snapshot

San Francisco County, California contains 170 public highway bridges in the FHWA National Bridge Inventory. Roughly 16.5% are rated “Good,” 12.4% “Fair,” 2.4% “Poor,” and 2.4% 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.

170

Total Bridges

16.5%

Good

2.4%

Poor

2.4%

Structurally Deficient

Condition Distribution

Good

16.5% (28)

Fair

12.4% (21)

Poor

2.4% (4)

SD

2.4% (4)

All Bridges (170)

Sort:

NB AND SB RTE 280

Over: LYELL STREET

04-SF-280-R2.91-SF, San Francisco, CA

Built 1964 ADT: 600

MONTEREY BLV EB ON

Over: SAN JOSE,I280 RAMPS,BART

04-SF-280-R2.82-SF, San Francisco, CA

Built 1964 ADT: 5,000

MONTEREY BL WB ON

Over: BOSWORTH & SB280 ONRAMP

04-SF-280-R2.87-SF, San Francisco, CA

Built 1964 ADT: 1,650

SANJOSE-I280 RAMPS

Over: BOSWORTH STREET

04-SF-280-R2.90-SF, San Francisco, CA

Built 1964 ADT: 10,000

PEDESTRIAN WALKWAY

Over: INTERSTATE 280

04-SF-280-R2.04-SF, San Francisco, CA

Built 1964 ADT: 170,000

OCEAN AV, MUNIRAIL

Over: 280, 280 ON/OFF-RAMP

04-SF-280-R1.77-SF, San Francisco, CA

Built 1964 ADT: 153,800

GENEVA AVE

Over: ROUTE I 280

04-SF-280-R1.65-SF, San Francisco, CA

Built 1964 ADT: 166,000

PEDESTRIAN WALKWAY

Over: INTERSTATE 280

04-SF-280-R1.06-SF, San Francisco, CA

Built 1964 ADT: 166,000

20TH STREET

Over: ROUTE 280

04-SF-280-R6.39-SF, San Francisco, CA

Built 1968 ADT: 250

18TH STREET

Over: ROUTE 280

04-SF-280-R6.57-SF, San Francisco, CA

Built 1968 ADT: 350

INTERSTATE 280

Over: CHINA BASIN VIADUCT

04-SF-280-R6.61-SF, San Francisco, CA

Built 1971 ADT: 1,500

PEDESTRIAN WALKWAY

Over: U.S. HIGHWAY 101

04-SF-101-2.61-SF, San Francisco, CA

Built 1968 ADT: 234,000

BAYSHORE BLVD

Over: ROUTE 101

04-SF-101-0.56-SF, San Francisco, CA

Built 1970 ADT: 184,500

U.S.HIGHWAY 101

Over: CESAR CHAVEZ BLVD

04-SF-101-2.95-SF, San Francisco, CA

Built 1974 ADT: 130,000

CESAR CHVZ OFFRAMP

Over: POTRERO AVENUE

04-SF-101-2.96-SF, San Francisco, CA

Built 1974 ADT: 130,000

INTERSTATE 80 EB

Over: W80-FREMONT ST OFF RAMP

04-SF-080-4.95-SF, San Francisco, CA

Built 1935 ADT: 8,600

RTE 280 NB ON-RAMP

Over: CHINA BASIN, BERRY, 6 ST

04-SF-280-T7.18-SF, San Francisco, CA

Built 1998 ADT: 2,500

RTE 280 NB OFFRAMP

Over: CHINA BASIN, BERRY, 6 ST

04-SF-280-T7.18-SF, San Francisco, CA

Built 1998 ADT: 2,500

INTERSTATE 80 WB

Over: 2ND, 3RD AND 4TH STREET

04-SF-080-4.92-SF, San Francisco, CA

Built 2008 ADT: 27,000

INTERSTATE 80 EB

Over: 2ND, 3RD, AND 4TH

04-SF-080-4.92-SF, San Francisco, CA

Built 2008 ADT: 27,000

WB80-FREMONT ST

Over: ESX,HARR,CLEM,FOLSOM,1ST

04-SF-080-5.62R-SF, San Francisco, CA

Built 2008 ADT: 16,000

W80 - HARRISON OFF

Over: STERLING-E80,BRYANT,RNCN

04-SF-080-5.50L-SF, San Francisco, CA

Built 2008 ADT: 4,850

80 WB OFF RAMP

Over: 4TH STREET

04-SF-080-4.97-SF, San Francisco, CA

Built 2008 ADT: 9,900

I 280 S, AU LINE

Over: 280/101 INTERCHANGE

04-SF-280-R4.18L-SF, San Francisco, CA

Built 1960 ADT: 15,000

I 280 N, AL LINE

Over: 280/101 INTERCHANGE

04-SF-280-R4.16R-SF, San Francisco, CA

Built 1960 ADT: 24,800

I 280N-101N (RE)

Over: 280/101 INTERCHANGE

04-SF-280-R4.16R-SF, San Francisco, CA

Built 1960 ADT: 17,700

US101N-I 280S (WL)

Over: 280/101 INTERCHANGE

04-SF-101-1.79-SF, San Francisco, CA

Built 1960 ADT: 221,000

280N - 101S (WU)

Over: 280/101 INTERCHANGE

04-SF-101-1.79-SF, San Francisco, CA

Built 1960 ADT: 4,000

80 EB ONRAMP

Over: 4TH STREET

04-SF-080-4.97-SF, San Francisco, CA

Built 2008 ADT: 9,900

BIKE & PEDESTRIAN

Over: SB 101 OFF-RMP TO CS.CHV

04-SF-101-2.91-SF, San Francisco, CA

Built 2004 ADT: 12,400

US HIGHWAY 101 SB

Over: 101 NB - 1 SB CONNECTOR

04-SF-101-R9.58-SF, San Francisco, CA

Built 2011 ADT: 8,500

US HIGHWAY 101 NB

Over: 101 NB - 1 SB CONNECTOR

04-SF-101-R9.48-SF, San Francisco, CA

Built 2015 ADT: 59,000

US HIGHWAY 101 SB

Over: RTE 1 RMPS,CRISSY,COWLES

04-SF-101-R9.35-SF, San Francisco, CA

Built 2012 ADT: 8,000

US HIGHWAY 101 NB

Over: RTE 1N, LINCOLN,MCDOWELL

04-SF-101-R9.18-SF, San Francisco, CA

Built 2015 ADT: 64,000

101N -1S CONNECTOR

Over: STATE ROUTE 1

04-SF-101-R9.40-SF, San Francisco, CA

Built 2015 ADT: 64,000

1NB-101S CONNECTOR

Over: LINCOLN BLVD

04-SF-001-7.00-SF, San Francisco, CA

Built 2012 ADT: 3,250

U.S. HIGHWAY 101

Over: 13TH ST,MISSION &OTIS ST

04-SF-101-R4.74-SF, San Francisco, CA

Built 2005 ADT: 22,000

CALTRAIN & UP RR

Over: CESAR CHAVEZ ST

JUST W O/PENNSYLVANIA AVE, San Francisco, CA

Built 1936 ADT: 20,729

PEDESTRIAN WALKWAY

Over: SAN JOSE AVE

OVER SAN JOSE AVE, San Francisco, CA

Built 1963 ADT: 36,960

RICHLAND AVE

Over: SAN JOSE AVE

SOUTH OF 34C0016, San Francisco, CA

Built 1927 ADT: 50,000

HIGHLAND AVE

Over: SAN JOSE AVE

NORTH OF 34C0015, San Francisco, CA

Built 1930 ADT: 50,000

PEDESTRIAN WALKWAY

Over: BOSWORTH STREET

1000 FT WEST OF S JOSE AV, San Francisco, CA

Built 1965 ADT: 22,315

PEDESTRIAN WALKWAY

Over: CESAR CHAVEZ ST

OVER ARMY STREET, San Francisco, CA

Built 1972 ADT: 63,120

POTRERO AVE

Over: CESAR CHAVEZ ST

OVER CESAR CHAVEZ ST, San Francisco, CA

Built 1974 ADT: 30,960

PEDESTRIAN WALKWAY

Over: MARKET STREET

OVER MARKET ST, San Francisco, CA

Built 1958 ADT: 27,000

PEDESTRIAN WALKWAY

Over: MARKET STREET

OVER MARKET STREET, San Francisco, CA

Built 1958 ADT: 25,989

HYDE ST

Over: BROADWAY

OVER BROADWAY, San Francisco, CA

Built 1952 ADT: 50,000

PEDESTRIAN WALKWAY

Over: PORTOLA DRIVE

JUST W/O KENSINGTON WY, San Francisco, CA

Built 1971 ADT: 25,989

FILLMORE ST

Over: GEARY BLVD

OVER GEARY BLVD, San Francisco, CA

Built 1961 ADT: 41,040

PEDESTRIAN WALKWAY

Over: GEARY BLVD

OVER GEARY BLVD, San Francisco, CA

Built 1966 ADT: 52,440

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