US Bridges

I40 Bus US421 over Salem Ave. Sou.Rr. Respw

Good

Forsyth County, North Carolina · 0.2 Mi. W. Jct. US52 · Structure no. 000000000670345

Built
1998
27 years old
Condition
Good
inspected September 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
660 ft
2 main spans
Daily traffic
17,000
2022 count
Owner
State
State Highway Agency

About this bridge

I40 Bus US421 over Salem Ave. Sou.Rr. Respw is a steel continuous stringer/multi-beam or girder carrying I40 Bus US421 over Salem Ave. Sou.Rr. Respw in Forsyth County, North Carolina. It was built in 1998, so it is 27 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 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 17,000 vehicles a day, roughly 12% of them trucks, projected to reach 34,000 by 2040. The structure is 660 ft (201.1 m) long and 97 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesI40 Bus US421
CrossesSalem Ave. Sou.Rr. Respw
Location0.2 Mi. W. Jct. US52
RouteInterstate 40
CountyForsyth County
StateNorth Carolina
Coordinates36.09342, -80.23689
Functional classUrban Principal Arterial - Other Freeway or Expressway

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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating86 US tons
Inventory rating48.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2 (+6 approach)
Design loadHS 20 + Mod
Structure length660 ft (201.1 m)
Longest span150 ft (45.7 m)
Deck width97 ft (29.5 m)
Roadway width94 ft (28.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic17,000 (2022)
Projected traffic34,000 by 2040
Trucks12%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway and railroad
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemYes

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 Bus US421 over Salem Ave. Sou.Rr. Respw built?

It was built in 1998, making it 27 years old in 2025.

What condition is I40 Bus US421 over Salem Ave. Sou.Rr. Respw 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 September 2024.

How much traffic does I40 Bus US421 over Salem Ave. Sou.Rr. Respw carry?

About 17,000 vehicles per day (2022 count), of which roughly 12% are trucks.

How long is I40 Bus US421 over Salem Ave. Sou.Rr. Respw?

The structure is 660 ft (201.1 m) long with a longest span of 150 ft (45.7 m) and a deck 97 ft wide.

Who owns I40 Bus US421 over Salem Ave. Sou.Rr. Respw?

It is owned by the State Highway Agency.