US Bridges

I40 over SR 20

Good

Madison County, Tennessee · 1 MI W of SR 5 · Structure no. 57I00400023

Built
2023
2 years old
Condition
Good
inspected October 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
239 ft
4 main spans
Daily traffic
49,487
2021 count
Owner
State
State Highway Agency

About this bridge

I40 over SR 20 is a prestressed concrete continuous stringer/multi-beam or girder carrying I40 over SR 20 in Madison County, Tennessee. It was built in 2023, so it is 2 years old, younger than the Tennessee average of 47.4 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 49,487 vehicles a day, roughly 8% of them trucks, projected to reach 79,179 by 2042. The structure is 239 ft (72.7 m) long and 149 ft wide. If it were closed, the detour would be 36 mi (58 km).

Location

Open in Google Maps
CarriesI40
CrossesSR 20
Location1 MI W of SR 5
RouteInterstate 40
CountyMadison County
StateTennessee
Coordinates35.65711, -88.87489
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.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation8: Equal to present desirable criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46.4 US tons
Inventory rating35.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHL 93
Structure length239 ft (72.7 m)
Longest span72 ft (21.9 m)
Deck width149 ft (45.5 m)
Roadway width148 ft (45.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic49,487 (2021)
Projected traffic79,179 by 2042
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed36 mi (58 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$2.5 million (2022 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was I40 over SR 20 built?

It was built in 2023, making it 2 years old in 2025.

What condition is I40 over SR 20 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 October 2023.

How much traffic does I40 over SR 20 carry?

About 49,487 vehicles per day (2021 count), of which roughly 8% are trucks.

How long is I40 over SR 20?

The structure is 239 ft (72.7 m) long with a longest span of 72 ft (21.9 m) and a deck 149 ft wide.

Who owns I40 over SR 20?

It is owned by the State Highway Agency.