US Bridges

I-74 Northbound over I-40BUS/US 421

Good

Forsyth County, North Carolina · 0.7 Mi. N.Jct.Us 421 Ramp · Structure no. 000000000670678

Built
2020
5 years old
Condition
Good
inspected March 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
216 ft
2 main spans
Daily traffic
100
2018 count
Owner
State
State Highway Agency

About this bridge

I-74 Northbound over I-40BUS/US 421 is a prestressed concrete stringer/multi-beam or girder carrying I-74 Northbound over I-40BUS/US 421 in Forsyth County, North Carolina. It was built in 2020, so it is 5 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 100 vehicles a day, roughly 16% of them trucks, projected to reach 200 by 2040. The structure is 216 ft (65.8 m) long and 64 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

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CarriesI-74 Northbound
CrossesI-40BUS/US 421
Location0.7 Mi. N.Jct.Us 421 Ramp
RouteInterstate 74
CountyForsyth County
StateNorth Carolina
Coordinates36.11287, -80.13009
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.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating82.9 US tons
Inventory rating62.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadH 10
Structure length216 ft (65.8 m)
Longest span109 ft (33.2 m)
Deck width64 ft (19.4 m)
Roadway width60 ft (18.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2018)
Projected traffic200 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 I-74 Northbound over I-40BUS/US 421 built?

It was built in 2020, making it 5 years old in 2025.

What condition is I-74 Northbound over I-40BUS/US 421 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 March 2024.

How much traffic does I-74 Northbound over I-40BUS/US 421 carry?

About 100 vehicles per day (2018 count), of which roughly 16% are trucks.

How long is I-74 Northbound over I-40BUS/US 421?

The structure is 216 ft (65.8 m) long with a longest span of 109 ft (33.2 m) and a deck 64 ft wide.

Who owns I-74 Northbound over I-40BUS/US 421?

It is owned by the State Highway Agency.