US Bridges

US1N over US401

Good

Wake County, North Carolina · .15 Mi.N. of SR2034 · Structure no. 000000001830297

Built
1998
27 years old
Condition
Good
inspected June 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
193 ft
1 main span
Daily traffic
21,250
2021 count
Owner
State
State Highway Agency

About this bridge

US1N over US401 is a steel stringer/multi-beam or girder carrying US1N over US401 in Wake 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 21,250 vehicles a day, roughly 12% of them trucks, projected to reach 42,500 by 2040. The structure is 193 ft (58.8 m) long and 58 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesUS1N
CrossesUS401
Location.15 Mi.N. of SR2034
RouteU.S. Route 1
Coordinates35.83993, -78.57966
Functional classUrban Other Principal 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.
Substructure8 Very GoodNo problems noted.
Last inspectionJune 2024
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 rating99 US tons
Inventory rating65.9 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length193 ft (58.8 m)
Longest span183 ft (55.7 m)
Deck width58 ft (17.8 m)
Roadway width55 ft (16.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic21,250 (2021)
Projected traffic42,500 by 2040
Trucks12%
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

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 US1N over US401 built?

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

What condition is US1N over US401 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 June 2024.

How much traffic does US1N over US401 carry?

About 21,250 vehicles per day (2021 count), of which roughly 12% are trucks.

How long is US1N over US401?

The structure is 193 ft (58.8 m) long with a longest span of 183 ft (55.7 m) and a deck 58 ft wide.

Who owns US1N over US401?

It is owned by the State Highway Agency.