US Bridges

State Route 237 over Middlefield Road

Good

Santa Clara County, California · 04-SCL-237-M1.60-MVW · Structure no. 37 0552

Built
1997
28 years old
Condition
Good
inspected April 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete Continuous
Length
197 ft
2 main spans
Daily traffic
68,000
2009 count
Owner
State
State Highway Agency

About this bridge

State Route 237 over Middlefield Road is a prestressed concrete continuous box beam or girders - multiple carrying State Route 237 over Middlefield Road in Santa Clara County, California. It was built in 1997, so it is 28 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 68,000 vehicles a day, roughly 6% of them trucks, projected to reach 100,264 by 2041. The structure is 197 ft (60.1 m) long and 133 ft wide.

CarriesState Route 237
CrossesMiddlefield Road
Location04-SCL-237-M1.60-MVW
RouteState Highway 237
Coordinates37.39218, -122.05009
Functional classUrban Principal Arterial - Other Freeway or Expressway

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 inspectionApril 2023
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 rating59.6 US tons
Inventory rating35.7 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
Structure length197 ft (60.1 m)
Longest span99 ft (30.3 m)
Deck width133 ft (40.4 m)
Roadway width127 ft (38.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic68,000 (2009)
Projected traffic100,264 by 2041
Trucks6%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
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 State Route 237 over Middlefield Road built?

It was built in 1997, making it 28 years old in 2025.

What condition is State Route 237 over Middlefield Road 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 April 2023.

How much traffic does State Route 237 over Middlefield Road carry?

About 68,000 vehicles per day (2009 count), of which roughly 6% are trucks.

How long is State Route 237 over Middlefield Road?

The structure is 197 ft (60.1 m) long with a longest span of 99 ft (30.3 m) and a deck 133 ft wide.

Who owns State Route 237 over Middlefield Road?

It is owned by the State Highway Agency.