US Bridges

Interstate 505 NB over Midway RD

Good

Solano County, California · 04-SOL-505-R3.06-VAC · Structure no. 23 0168R

Built
1974
51 years old
Condition
Good
inspected April 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
90 ft
1 main span
Daily traffic
16,750
2009 count
Owner
State
State Highway Agency

About this bridge

Interstate 505 NB over Midway RD is a prestressed concrete box beam or girders - multiple carrying Interstate 505 NB over Midway RD in Solano County, California. It was built in 1974, so it is 51 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 16,750 vehicles a day, roughly 10% of them trucks, projected to reach 25,619 by 2046. The structure is 90 ft (27.4 m) long and 42 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesInterstate 505 NB
CrossesMidway RD
Location04-SOL-505-R3.06-VAC
RouteInterstate 505
Coordinates38.41693, -121.94421
Functional classUrban Principal Arterial - Interstate

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 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating51 US tons
Inventory rating37.5 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length90 ft (27.4 m)
Longest span89 ft (27.1 m)
Deck width42 ft (12.8 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic16,750 (2009)
Projected traffic25,619 by 2046
Trucks10%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed0.6 mi (1 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 505 NB over Midway RD built?

It was built in 1974, making it 51 years old in 2025.

What condition is Interstate 505 NB over Midway RD 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 2024.

How much traffic does Interstate 505 NB over Midway RD carry?

About 16,750 vehicles per day (2009 count), of which roughly 10% are trucks.

How long is Interstate 505 NB over Midway RD?

The structure is 90 ft (27.4 m) long with a longest span of 89 ft (27.1 m) and a deck 42 ft wide.

Who owns Interstate 505 NB over Midway RD?

It is owned by the State Highway Agency.