San Francisco County, CA

170 public highway bridges

San Francisco County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, San Francisco County, California contains 170 public highway bridges. Roughly 16.5% are rated “Good,” 12.4% “Fair,” and 2.4% “Poor.” Poor means the lowest applicable deck, superstructure, substructure, or culvert rating is 4 or below on the 0–9 NBI scale. It is a condition category, not a live safety or closure decision.

Responsible agencies inspect covered bridges on risk-based intervals under current NBIS rules and submit inventory data to FHWA annually. The list below shows every NBI-tracked bridge in the county. Use the “Sort by” controls to change the ordering, and click any row for its reported inspection date, traffic count, and condition fields.

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

170

Total Bridges

16.5%

Good

12.4%

Fair

2.4%

Poor Condition

Condition Distribution

Good

16.5% (28)

Fair

12.4% (21)

Poor

2.4% (4)

All Bridges (170)

Sort:

ROUTE 35

Over: SUNSET BLVD

04-SF-035-2.12-SF, San Francisco, CA

Built 1931 ADT: 2,000

INTERSTATE 80

Over: YERBA BUENA ISLAND

04-SF-080-7.85L-SF, San Francisco, CA

Built 1936 ADT: 248,000

INTERSTATE 80

Over: YERBA BUENA ISLAND

04-SF-080-7.85L-SF, San Francisco, CA

Built 2007 ADT: 248,000

MISSION STREET

Over: ROUTE I 280

04-SF-280-R3.11-SF, San Francisco, CA

Built 1963 ADT: 170,000

MISSION STREET

Over: ALEMANY BLVD

04-SF-280-R3.11-SF, San Francisco, CA

Built 1951 ADT: 19,200

ALEMANY BLVD

Over: STATE RTE 1 (SPANS 4&5)

04-SF-001-R0.11-SF, San Francisco, CA

Built 1950 ADT: 122,000

INTERSTATE 280

Over: ALEMANY BLVD

04-SF-280-R0.46-SF, San Francisco, CA

Built 1966 ADT: 12,870

U.S. HIGHWAY 101

Over: 3RD STREET

04-SF-101-0.77-SF, San Francisco, CA

Built 1954 ADT: 2,000

U.S. HIGHWAY 101

Over: 3RD STREET

04-SF-101-0.77-SF, San Francisco, CA

Built 1955 ADT: 550

PEDESTRIAN WALKWAY

Over: U.S. HIGHWAY 101

04-SF-101-0.70-SF, San Francisco, CA

Built 1970 ADT: 189,000

SILVER AVE

Over: ROUTE 101

04-SF-101-1.77-SF, San Francisco, CA

Built 1954 ADT: 196,000

U.S. HIGHWAY 101

Over: 280/101 IC - ALEMANY CIR

04-SF-101-2.03-SF, San Francisco, CA

Built 1950 ADT: 500

U.S. HIGHWAY 101

Over: CESAR CHAVEZ BLVD

04-SF-101-2.92-SF, San Francisco, CA

Built 1951 ADT: 1,500

U.S. HIGHWAY 101

Over: CESAR CHAVEZ BLVD

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

Built 1974 ADT: 500

23RD STREET

Over: U.S. HIGHWAY 101

04-SF-101-3.37-SF, San Francisco, CA

Built 1953 ADT: 234,000

STATE ROUTE 1

Over: BROTHERHOOD WAY

04-SF-001-R0.31-SF, San Francisco, CA

Built 1952 ADT: 550

U.S. HIGHWAY 101

Over: CORTLAND AVENUE

04-SF-101-2.28-SF, San Francisco, CA

Built 1950 ADT: 750

INTERSTATE 280

Over: CALTRAIN,UP RR,CITY STS

04-SF-280-R4.40L-SF, San Francisco, CA

Built 1965 ADT: 600

N101 CESAR OFFRMP

Over: SB101 BAYSHORE OFF-RAMP

04-SF-101-2.84-SF, San Francisco, CA

Built 1950 ADT: 500

18TH STREET POC

Over: U.S. HIGHWAY 101

04-SF-101-3.96-SF, San Francisco, CA

Built 1953 ADT: 234,000

25TH ST POC

Over: U.S. HIGHWAY 101

04-SF-101-3.22-SF, San Francisco, CA

Built 1953 ADT: 234,000

22ND STREET POC

Over: U.S. HIGHWAY 101

04-SF-101-3.53-SF, San Francisco, CA

Built 1953 ADT: 234,000

U.S. HIGHWAY 101

Over: PAUL AVE

04-SF-101-1.11-SF, San Francisco, CA

Built 1954 ADT: 1,500

U.S. HIGHWAY 101

Over: BACON STREET

04-SF-101-1.41-SF, San Francisco, CA

Built 1954 ADT: 1,200

U.S. HIGHWAY 101

Over: BACON STREET

04-SF-101-1.41-SF, San Francisco, CA

Built 1960 ADT: 1,000

U.S. HIGHWAY 101

Over: BLANKEN AVE

04-SF-101-0.18-SF, San Francisco, CA

Built 1954 ADT: 65

ROUTE 101N ONRAMP

Over: ALEMANY CIR UC (NBD O-R)

04-SF-101-2.20-SF, San Francisco, CA

Built 1950 ADT: 900

SB ROUTE 101 ONRMP

Over: ALEMANY CIR

04-SF-101-2.00-SF, San Francisco, CA

Built 1954 ADT: 1,200

101 AND 280

Over: 280/101 INTERCHANGE

04-SF-101-1.63-SF, San Francisco, CA

Built 1960 ADT: 10,000

S280-S101 CONNECTR

Over: N101-N280 CONNECTOR RAMP

04-SF-280-R4.07L-SF, San Francisco, CA

Built 1966 ADT: 24,800

I 280 - 101S (WU)

Over: 280/101 INTERCHANGE

04-SF-101-1.48-SF, San Francisco, CA

Built 1960 ADT: 222,000

S101-S280 CONNECTO

Over: 280/101 IC -ALEMANY BLVD

04-SF-101-1.94-SF, San Francisco, CA

Built 1960 ADT: 450

ALEMANY BLVD NB

Over: ROUTE I 280

04-SF-280-R3.87-SF, San Francisco, CA

Built 1963 ADT: 170,000

ALEMANY BLVD SB

Over: ROUTE I 280

04-SF-280-R3.28-SF, San Francisco, CA

Built 1963 ADT: 170,000

JUSTIN DRIVE

Over: ROUTE I 280

04-SF-280-R3.23-SF, San Francisco, CA

Built 1963 ADT: 170,000

PEDESTRIAN WALKWAY

Over: INTERSTATE 280

04-SF-280-R3.53-SF, San Francisco, CA

Built 1963 ADT: 170,000

U.S. HIGHWAY 101

Over: I-80 & US 101 RAMPS,STRS

04-SF-101-R4.25L-SF, San Francisco, CA

Built 1955 ADT: 199,000

THERESA ST POC

Over: RTE I 280S ONRAMP

04-SF-280-R2.62-SF, San Francisco, CA

Built 1964 ADT: 170,000

I280S OFF-MONTEREY

Over: I 280,SAN JOSE,MUNI,BART

04-SF-280-R2.72-SF, San Francisco, CA

Built 1964 ADT: 10,000

ROUTE I 280 SB

Over: SAN JOSE AVE, MUNIRAIL

04-SF-280-R2.70-SF, San Francisco, CA

Built 1964 ADT: 10,000

ROUTE I 280

Over: SAN JOSE AVE, MUNIRAIL

04-SF-280-R2.70-SF, San Francisco, CA

Built 1964 ADT: 10,000

RTE I 280N OFFRAMP

Over: SAN JOSE AVE, MUNIRAIL

04-SF-280-R2.69-SF, San Francisco, CA

Built 1964 ADT: 10,000

MONTEREY-I 280N ON

Over: I 280,SAN JOSE,MUNI,BART

04-SF-280-R2.69-SF, San Francisco, CA

Built 1964 ADT: 21,600

PAULDING/JUDSON ST

Over: RTE I 280, BART-2 TRACKS

04-SF-280-R2.21-SF, San Francisco, CA

Built 1964 ADT: 170,000

BADEN STREET

Over: RTE I 280, BART TUNNELS

04-SF-280-R2.47-SF, San Francisco, CA

Built 1964 ADT: 170,000

I 280

Over: SAN JOSE & SICKLES AVE

04-SF-280-R0.71-SF, San Francisco, CA

Built 1964 ADT: 21,600

RTE I 280 N ONRAMP

Over: SICKLES AVENUE

04-SF-280-R0.75-SF, San Francisco, CA

Built 1964 ADT: 10,000

SAN JOSE AVE

Over: SB 280 OFF-RAMP

04-SF-280-R0.90-SF, San Francisco, CA

Built 1964 ADT: 13,300

SAN JOSE, MUNIRAIL

Over: ROUTE I 280

04-SF-280-R1.46-SF, San Francisco, CA

Built 1964 ADT: 166,000

ST RTE 101 (5TH ST

Over: BAYSHORE VIADUCT

04-SF-101-4.12-SF, San Francisco, CA

Built 1955 ADT: 2,600

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

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Data sourced from official public datasets. See our methodology for details. Retrieved and formatted by PlainBridges

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Compiled by PlainBridges, Independent data publisher

Every figure on PlainBridge is rendered directly from federal source data, no number is typed in by an editor. This page draws directly on federal source data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.