US Bridges

I155 over I155 / SR 78

Fair

Dyer County, Tennessee · 5.6 M E JCT I155&SR182 · Structure no. 23I01550025

Built
1979
46 years old
Condition
Fair
inspected October 2023
Type
Box Beam or Girders - Single or Spread
Concrete Continuous
Length
226 ft
2 main spans
Daily traffic
11,357
2021 count
Owner
State
State Highway Agency

About this bridge

I155 over I155 / SR 78 is a concrete continuous box beam or girders - single or spread carrying I155 over I155 / SR 78 in Dyer County, Tennessee. It was built in 1979, so it is 46 years old, younger 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 11,357 vehicles a day, roughly 8% of them trucks, projected to reach 17,797 by 2042. The structure is 226 ft (68.9 m) long and 44 ft wide.

Location

Open in Google Maps
CarriesI155
CrossesI155 / SR 78
Location5.6 M E JCT I155&SR182
RouteInterstate 155
CountyDyer County
StateTennessee
Coordinates36.06858, -89.397
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionOctober 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 geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating28.2 US tons
Inventory rating21.8 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length226 ft (68.9 m)
Longest span120 ft (36.6 m)
Deck width44 ft (13.5 m)
Roadway width42 ft (12.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,357 (2021)
Projected traffic17,797 by 2042
Trucks8%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
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 proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was I155 over I155 / SR 78 built?

It was built in 1979, making it 46 years old in 2025.

What condition is I155 over I155 / SR 78 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 October 2023.

How much traffic does I155 over I155 / SR 78 carry?

About 11,357 vehicles per day (2021 count), of which roughly 8% are trucks.

How long is I155 over I155 / SR 78?

The structure is 226 ft (68.9 m) long with a longest span of 120 ft (36.6 m) and a deck 44 ft wide.

Who owns I155 over I155 / SR 78?

It is owned by the State Highway Agency.