US Bridges

I40 Wbl over I74 US311 Wbl

Fair

Forsyth County, North Carolina · 0.5 Mi. E. Jct. SR2700 · Structure no. 000000000670434

Built
1989
36 years old
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
140 ft
3 main spans
Daily traffic
49,250
2022 count
Owner
State
State Highway Agency

About this bridge

I40 Wbl over I74 US311 Wbl is a steel stringer/multi-beam or girder carrying I40 Wbl over I74 US311 Wbl in Forsyth County, North Carolina. It was built in 1989, so it is 36 years old, younger 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 49,250 vehicles a day, roughly 16% of them trucks, projected to reach 98,500 by 2040. The structure is 140 ft (42.6 m) long and 43 ft wide.

Location

Open in Google Maps
CarriesI40 Wbl
CrossesI74 US311 Wbl
Location0.5 Mi. E. Jct. SR2700
RouteInterstate 40
CountyForsyth County
StateNorth Carolina
Coordinates36.06519, -80.18711
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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating68.9 US tons
Inventory rating40.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length140 ft (42.6 m)
Longest span62 ft (18.8 m)
Deck width43 ft (13 m)
Roadway width40 ft (12.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic49,250 (2022)
Projected traffic98,500 by 2040
Trucks16%
Lanes on structure2
Traffic directionOne-way traffic
CarriesOverpass structure at an interchange
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 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 Wbl over I74 US311 Wbl built?

It was built in 1989, making it 36 years old in 2025.

What condition is I40 Wbl over I74 US311 Wbl 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 September 2023.

How much traffic does I40 Wbl over I74 US311 Wbl carry?

About 49,250 vehicles per day (2022 count), of which roughly 16% are trucks.

How long is I40 Wbl over I74 US311 Wbl?

The structure is 140 ft (42.6 m) long with a longest span of 62 ft (18.8 m) and a deck 43 ft wide.

Who owns I40 Wbl over I74 US311 Wbl?

It is owned by the State Highway Agency.