US Bridges

Central Expressway over San Tomas Expressway

Good

Santa Clara County, California · At San Tomas Expwy · Structure no. 37C0081

Built
1977
48 years old
Condition
Good
inspected October 2022
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
193 ft
2 main spans
Daily traffic
36,160
2012 count
Owner
County
County Highway Agency

About this bridge

Central Expressway over San Tomas Expressway is a prestressed concrete box beam or girders - multiple carrying Central Expressway over San Tomas Expressway in Santa Clara County, California. It was built in 1977, so it is 48 years old, younger 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 36,160 vehicles a day, roughly 5% of them trucks, projected to reach 52,211 by 2044. The structure is 193 ft (58.8 m) long and 128 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesCentral Expressway
CrossesSan Tomas Expressway
LocationAt San Tomas Expwy
RouteCity Street 0
Coordinates37.37426, -121.96617
Functional classUrban Other Principal 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 inspectionOctober 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating51.8 US tons
Inventory rating37.1 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length193 ft (58.8 m)
Longest span94 ft (28.7 m)
Deck width128 ft (39 m)
Roadway width124 ft (37.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic36,160 (2012)
Projected traffic52,211 by 2044
Trucks5%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 Central Expressway over San Tomas Expressway built?

It was built in 1977, making it 48 years old in 2025.

What condition is Central Expressway over San Tomas Expressway 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 October 2022.

How much traffic does Central Expressway over San Tomas Expressway carry?

About 36,160 vehicles per day (2012 count), of which roughly 5% are trucks.

How long is Central Expressway over San Tomas Expressway?

The structure is 193 ft (58.8 m) long with a longest span of 94 ft (28.7 m) and a deck 128 ft wide.

Who owns Central Expressway over San Tomas Expressway?

It is owned by the County Highway Agency.