US Bridges

US158 over I40

Good

Forsyth County, North Carolina · 0.2 MI.N.JCT.SR3153 · Structure no. 000000000670441

Built
1990
35 years old
Condition
Good
inspected August 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
265 ft
4 main spans
Daily traffic
38,500
2022 count
Owner
State
State Highway Agency

About this bridge

US158 over I40 is a steel stringer/multi-beam or girder carrying US158 over I40 in Forsyth County, North Carolina. It was built in 1990, so it is 35 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 38,500 vehicles a day, roughly 6% of them trucks, projected to reach 77,000 by 2040. The structure is 265 ft (80.7 m) long and 83 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesUS158
CrossesI40
Location0.2 MI.N.JCT.SR3153
RouteU.S. Route 158
Coordinates36.06623, -80.30797
Functional classUrban Minor Arterial

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.
Substructure7 GoodSome minor problems.
Last inspectionAugust 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99 US tons
Inventory rating64.9 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20 + Mod
Structure length265 ft (80.7 m)
Longest span86 ft (26.2 m)
Deck width83 ft (25.4 m)
Roadway width76 ft (23.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic38,500 (2022)
Projected traffic77,000 by 2040
Trucks6%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was US158 over I40 built?

It was built in 1990, making it 35 years old in 2025.

What condition is US158 over I40 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 August 2024.

How much traffic does US158 over I40 carry?

About 38,500 vehicles per day (2022 count), of which roughly 6% are trucks.

How long is US158 over I40?

The structure is 265 ft (80.7 m) long with a longest span of 86 ft (26.2 m) and a deck 83 ft wide.

Who owns US158 over I40?

It is owned by the State Highway Agency.