US Bridges

I40 & US311 over Clemmonsville Road

Fair

Forsyth County, North Carolina · 0.4 Mi. E. Jct. SR2743 · Structure no. 000000000670340

Built
1980
45 years old, rebuilt 1992
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
176 ft
3 main spans
Daily traffic
112,000
2022 count
Owner
State
State Highway Agency

About this bridge

I40 & US311 over Clemmonsville Road is a steel stringer/multi-beam or girder carrying I40 & US311 over Clemmonsville Road in Forsyth County, North Carolina. It was built in 1980 and reconstructed in 1992, so it is 45 years old, older 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 112,000 vehicles a day, roughly 16% of them trucks, projected to reach 224,000 by 2040. The structure is 176 ft (53.6 m) long and 111 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

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CarriesI40 & US311
CrossesClemmonsville Road
Location0.4 Mi. E. Jct. SR2743
RouteState Highway 40
CountyForsyth County
StateNorth Carolina
Coordinates36.06007, -80.21969
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2024
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 rating99 US tons
Inventory rating65.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length176 ft (53.6 m)
Longest span96 ft (29.2 m)
Deck width111 ft (33.7 m)
Roadway width108 ft (32.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic112,000 (2022)
Projected traffic224,000 by 2040
Trucks16%
Lanes on structure6
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 & US311 over Clemmonsville Road built?

It was built in 1980, making it 45 years old in 2025. It was reconstructed in 1992.

What condition is I40 & US311 over Clemmonsville Road 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 2024.

How much traffic does I40 & US311 over Clemmonsville Road carry?

About 112,000 vehicles per day (2022 count), of which roughly 16% are trucks.

How long is I40 & US311 over Clemmonsville Road?

The structure is 176 ft (53.6 m) long with a longest span of 96 ft (29.2 m) and a deck 111 ft wide.

Who owns I40 & US311 over Clemmonsville Road?

It is owned by the State Highway Agency.