US Bridges

Interstate 780 WB over Access Road

Fair

Solano County, California · 04-SOL-780-1.23-BEN · Structure no. 23 0127R

Built
1962
63 years old
Condition
Fair
inspected December 2023
Type
Tee Beam
Concrete Continuous
Length
161 ft
3 main spans
Daily traffic
23,500
2009 count
Owner
State
State Highway Agency

About this bridge

Interstate 780 WB over Access Road is a concrete continuous tee beam carrying Interstate 780 WB over Access Road in Solano County, California. It was built in 1962, so it is 63 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 6 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 23,500 vehicles a day, roughly 5% of them trucks, projected to reach 40,470 by 2042. The structure is 161 ft (49.1 m) long and 42 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesInterstate 780 WB
CrossesAccess Road
Location04-SOL-780-1.23-BEN
RouteInterstate 780
Coordinates38.05025, -122.13994
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46.4 US tons
Inventory rating33.2 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length161 ft (49.1 m)
Longest span56 ft (17.1 m)
Deck width42 ft (12.7 m)
Roadway width39 ft (11.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic23,500 (2009)
Projected traffic40,470 by 2042
Trucks5%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesOther
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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 Interstate 780 WB over Access Road built?

It was built in 1962, making it 63 years old in 2025.

What condition is Interstate 780 WB over Access Road 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 December 2023.

How much traffic does Interstate 780 WB over Access Road carry?

About 23,500 vehicles per day (2009 count), of which roughly 5% are trucks.

How long is Interstate 780 WB over Access Road?

The structure is 161 ft (49.1 m) long with a longest span of 56 ft (17.1 m) and a deck 42 ft wide.

Who owns Interstate 780 WB over Access Road?

It is owned by the State Highway Agency.