US Bridges

San Jose Munirail over Route I 280

Fair

San Francisco County, California · 04-SF-280-R1.46-SF · Structure no. 34 0087

Built
1964
61 years old
Condition
Fair
inspected April 2024
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
221 ft
2 main spans
Daily traffic
21,542
2017 count
Owner
State
State Highway Agency

About this bridge

San Jose Munirail over Route I 280 is a concrete continuous box beam or girders - multiple carrying San Jose Munirail over Route I 280 in San Francisco County, California. It was built in 1964, so it is 61 years old, older than the California average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 21,542 vehicles a day, roughly 1% of them trucks, projected to reach 30,893 by 2044. The structure is 221 ft (67.5 m) long and 74 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesSan Jose Munirail
CrossesRoute I 280
Location04-SF-280-R1.46-SF
RouteCity Street 0D012
Coordinates37.71814, -122.4488
Functional classUrban Other Principal Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating89.9 US tons
Inventory rating53.9 US tons

Structure

MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
Structure length221 ft (67.5 m)
Longest span113 ft (34.4 m)
Deck width74 ft (22.6 m)
Roadway width60 ft (18.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic21,542 (2017)
Projected traffic30,893 by 2044
Trucks1%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was San Jose Munirail over Route I 280 built?

It was built in 1964, making it 61 years old in 2025.

What condition is San Jose Munirail over Route I 280 in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in April 2024.

How much traffic does San Jose Munirail over Route I 280 carry?

About 21,542 vehicles per day (2017 count), of which roughly 1% are trucks.

How long is San Jose Munirail over Route I 280?

The structure is 221 ft (67.5 m) long with a longest span of 113 ft (34.4 m) and a deck 74 ft wide.

Who owns San Jose Munirail over Route I 280?

It is owned by the State Highway Agency.