US Bridges

San Antonio Road over Caltrain UP RR Central

Good

Santa Clara County, California · At Alma Street · Structure no. 37C0120

Built
1961
64 years old
Condition
Good
inspected January 2024
Type
Slab
Concrete Continuous
Length
361 ft
7 main spans
Daily traffic
48,000
2013 count
Owner
City
City or Municipal Highway Agency

About this bridge

San Antonio Road over Caltrain UP RR Central is a concrete continuous slab carrying San Antonio Road over Caltrain UP RR Central in Santa Clara County, California. It was built in 1961, so it is 64 years old, older than the California average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 48,000 vehicles a day, roughly 2% of them trucks, projected to reach 51,179 by 2042. The structure is 361 ft (110 m) long and 86 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesSan Antonio Road
CrossesCaltrain UP RR Central
LocationAt Alma Street
RouteCity Street 0
Coordinates37.40774, -122.10862
Functional classUrban Minor Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionJanuary 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating71.1 US tons
Inventory rating42.9 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans7
Design loadHS 20
Structure length361 ft (110 m)
Longest span65 ft (19.8 m)
Deck width86 ft (26.2 m)
Roadway width73 ft (22.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic48,000 (2013)
Projected traffic51,179 by 2042
Trucks2%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway and railroad
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 Antonio Road over Caltrain UP RR Central built?

It was built in 1961, making it 64 years old in 2025.

What condition is San Antonio Road over Caltrain UP RR Central in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in January 2024.

How much traffic does San Antonio Road over Caltrain UP RR Central carry?

About 48,000 vehicles per day (2013 count), of which roughly 2% are trucks.

How long is San Antonio Road over Caltrain UP RR Central?

The structure is 361 ft (110 m) long with a longest span of 65 ft (19.8 m) and a deck 86 ft wide.

Who owns San Antonio Road over Caltrain UP RR Central?

It is owned by the City or Municipal Highway Agency.