US Bridges

I-40 Bus. over I-40 under

Good

Custer County, Oklahoma · EB Off-Ramp Clinton Kmart · Structure no. 144550000000000

Built
1959
66 years old
Condition
Good
inspected September 2024
Type
Slab
Concrete Continuous
Length
184 ft
4 main spans
Daily traffic
8,000
2022 count
Owner
State
State Highway Agency

About this bridge

I-40 Bus. over I-40 under is a concrete continuous slab carrying I-40 Bus. over I-40 under in Custer County, Oklahoma. It was built in 1959, so it is 66 years old, older than the Oklahoma average of 47.8 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 8,000 vehicles a day, roughly 5% of them trucks, projected to reach 12,800 by 2042. The structure is 184 ft (56.1 m) long and 29 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesI-40 Bus.
CrossesI-40 under
LocationEB Off-Ramp Clinton Kmart
RouteState Highway 40B
CountyCuster County
StateOklahoma
Coordinates35.49722, -98.98528
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 inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment7: Better than present minimum criteria
Operating rating40.2 US tons
Inventory rating24.1 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadH 20
Structure length184 ft (56.1 m)
Longest span59 ft (18 m)
Deck width29 ft (8.8 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,000 (2022)
Projected traffic12,800 by 2042
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed3.7 mi (6 km)
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$2.7 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-40 Bus. over I-40 under built?

It was built in 1959, making it 66 years old in 2025.

What condition is I-40 Bus. over I-40 under 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 September 2024.

How much traffic does I-40 Bus. over I-40 under carry?

About 8,000 vehicles per day (2022 count), of which roughly 5% are trucks.

How long is I-40 Bus. over I-40 under?

The structure is 184 ft (56.1 m) long with a longest span of 59 ft (18 m) and a deck 29 ft wide.

Who owns I-40 Bus. over I-40 under?

It is owned by the State Highway Agency.