US Bridges

I40 over 21st Ave N

Fair

Davidson County, Tennessee · I40/21st Ave N · Structure no. 19I00400155

Built
1967
58 years old
Condition
Fair
inspected November 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
134 ft
3 main spans
Daily traffic
95,652
2021 count
Owner
State
State Highway Agency

About this bridge

I40 over 21st Ave N is a prestressed concrete continuous stringer/multi-beam or girder carrying I40 over 21st Ave N in Davidson County, Tennessee. It was built in 1967, so it is 58 years old, older than the Tennessee average of 47.4 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 95,652 vehicles a day, roughly 7% of them trucks, projected to reach 170,206 by 2042. The structure is 134 ft (40.8 m) long and 58 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI40
Crosses21st Ave N
LocationI40/21st Ave N
RouteInterstate I0040
CountyDavidson County
StateTennessee
Coordinates36.1697, -86.80978
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment8: Equal to present desirable criteria
Operating rating63.5 US tons
Inventory rating35.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length134 ft (40.8 m)
Longest span63 ft (19.2 m)
Deck width58 ft (17.6 m)
Roadway width55 ft (16.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic95,652 (2021)
Projected traffic170,206 by 2042
Trucks7%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
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 statusHistorical significance not determinable at this time
Work proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$1.4 million (2022 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was I40 over 21st Ave N built?

It was built in 1967, making it 58 years old in 2025.

What condition is I40 over 21st Ave N 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 November 2023.

How much traffic does I40 over 21st Ave N carry?

About 95,652 vehicles per day (2021 count), of which roughly 7% are trucks.

How long is I40 over 21st Ave N?

The structure is 134 ft (40.8 m) long with a longest span of 63 ft (19.2 m) and a deck 58 ft wide.

Who owns I40 over 21st Ave N?

It is owned by the State Highway Agency.