US Bridges

SR1800 over US401SB

Fair

Wake County, North Carolina · 0.11 MI N JCT US401N · Structure no. 000000001830200

Built
1960
65 years old
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
178 ft
3 main spans
Daily traffic
2,100
2022 count
Owner
State
State Highway Agency

About this bridge

SR1800 over US401SB is a steel stringer/multi-beam or girder carrying SR1800 over US401SB in Wake County, North Carolina. It was built in 1960, so it is 65 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 fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 2,100 vehicles a day, roughly 7% of them trucks, projected to reach 4,200 by 2040. The structure is 178 ft (54.2 m) long and 39 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesSR1800
CrossesUS401SB
Location0.11 MI N JCT US401N
RouteState Highway 1800
CountyWake County
StateNorth Carolina
Coordinates35.79833, -78.63927
Functional classUrban Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating70 US tons
Inventory rating42 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length178 ft (54.2 m)
Longest span77 ft (23.4 m)
Deck width39 ft (12 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,100 (2022)
Projected traffic4,200 by 2040
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
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 proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was SR1800 over US401SB built?

It was built in 1960, making it 65 years old in 2025.

What condition is SR1800 over US401SB in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in August 2024.

How much traffic does SR1800 over US401SB carry?

About 2,100 vehicles per day (2022 count), of which roughly 7% are trucks.

How long is SR1800 over US401SB?

The structure is 178 ft (54.2 m) long with a longest span of 77 ft (23.4 m) and a deck 39 ft wide.

Who owns SR1800 over US401SB?

It is owned by the State Highway Agency.