US Bridges

I40 Wbl over SR1728

Good

Wake County, North Carolina · 0.4 MI.E.SR1655 · Structure no. 000000001830554

Built
1981
44 years old, rebuilt 2011
Condition
Good
inspected February 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
265 ft
3 main spans
Daily traffic
133,000
2020 count
Owner
State
State Highway Agency

About this bridge

I40 Wbl over SR1728 is a steel stringer/multi-beam or girder carrying I40 Wbl over SR1728 in Wake County, North Carolina. It was built in 1981 and reconstructed in 2011, so it is 44 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 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 133,000 vehicles a day, roughly 16% of them trucks, projected to reach 266,000 by 2040. The structure is 265 ft (80.7 m) long and 73 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesI40 Wbl
CrossesSR1728
Location0.4 MI.E.SR1655
RouteInterstate 40
CountyWake County
StateNorth Carolina
Coordinates35.81548, -78.73816
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 inspectionFebruary 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 rating87 US tons
Inventory rating66.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length265 ft (80.7 m)
Longest span131 ft (39.9 m)
Deck width73 ft (22.2 m)
Roadway width70 ft (21.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic133,000 (2020)
Projected traffic266,000 by 2040
Trucks16%
Lanes on structure3
Traffic directionOne-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 Wbl over SR1728 built?

It was built in 1981, making it 44 years old in 2025. It was reconstructed in 2011.

What condition is I40 Wbl over SR1728 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 February 2023.

How much traffic does I40 Wbl over SR1728 carry?

About 133,000 vehicles per day (2020 count), of which roughly 16% are trucks.

How long is I40 Wbl over SR1728?

The structure is 265 ft (80.7 m) long with a longest span of 131 ft (39.9 m) and a deck 73 ft wide.

Who owns I40 Wbl over SR1728?

It is owned by the State Highway Agency.