US Bridges

I40 over SR1973

Fair

Durham County, North Carolina · 0.8 MI.W.JCT.SR1959 · Structure no. 000000000630340

Built
1995
30 years old
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
188 ft
3 main spans
Daily traffic
147,000
2020 count
Owner
State
State Highway Agency

About this bridge

I40 over SR1973 is a steel stringer/multi-beam or girder carrying I40 over SR1973 in Durham County, North Carolina. It was built in 1995, so it is 30 years old, younger than the North Carolina average of 38.7 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 147,000 vehicles a day, roughly 16% of them trucks, projected to reach 294,000 by 2040. The structure is 188 ft (57.3 m) long and 173 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

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CarriesI40
CrossesSR1973
Location0.8 MI.W.JCT.SR1959
RouteInterstate 40
CountyDurham County
StateNorth Carolina
Coordinates35.8818, -78.83951
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 inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating92.9 US tons
Inventory rating56 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length188 ft (57.3 m)
Longest span101 ft (30.7 m)
Deck width173 ft (52.8 m)
Roadway width170 ft (51.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic147,000 (2020)
Projected traffic294,000 by 2040
Trucks16%
Lanes on structure9
Traffic directionTwo-way traffic
CarriesOverpass structure at an interchange
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 I40 over SR1973 built?

It was built in 1995, making it 30 years old in 2025.

What condition is I40 over SR1973 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 August 2023.

How much traffic does I40 over SR1973 carry?

About 147,000 vehicles per day (2020 count), of which roughly 16% are trucks.

How long is I40 over SR1973?

The structure is 188 ft (57.3 m) long with a longest span of 101 ft (30.7 m) and a deck 173 ft wide.

Who owns I40 over SR1973?

It is owned by the State Highway Agency.