US Bridges

I40 over I24

Poor

Davidson County, Tennessee · I24-I40 Interchange - C7 · Structure no. 19I00240067

Built
1960
65 years old
Condition
Poor
inspected December 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
153 ft
3 main spans
Daily traffic
154,055
2021 count
Owner
State
State Highway Agency

About this bridge

I40 over I24 is a steel stringer/multi-beam or girder carrying I40 over I24 in Davidson County, Tennessee. It was built in 1960, so it is 65 years old, older than the Tennessee average of 47.4 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 154,055 vehicles a day, roughly 7% of them trucks, projected to reach 246,488 by 2042. The structure is 153 ft (46.6 m) long and 46 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesI40
CrossesI24
LocationI24-I40 Interchange - C7
RouteInterstate I0040
CountyDavidson County
StateTennessee
Coordinates36.13983, -86.72791
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 2023
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 geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating80.4 US tons
Inventory rating48.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length153 ft (46.6 m)
Longest span83 ft (25.3 m)
Deck width46 ft (14.1 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic154,055 (2021)
Projected traffic246,488 by 2042
Trucks7%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed5 mi (8 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 statusHistorical significance not determinable at this time
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$1.6 million (2022 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was I40 over I24 built?

It was built in 1960, making it 65 years old in 2025.

What condition is I40 over I24 in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in December 2023.

How much traffic does I40 over I24 carry?

About 154,055 vehicles per day (2021 count), of which roughly 7% are trucks.

How long is I40 over I24?

The structure is 153 ft (46.6 m) long with a longest span of 83 ft (25.3 m) and a deck 46 ft wide.

Who owns I40 over I24?

It is owned by the State Highway Agency.