US Bridges

SR1578 over I-540

Good

Wake County, North Carolina · 0.1.MI.S.JCT.BUCKWOOD Dr. · Structure no. 000000001831545

Built
2022
3 years old
Condition
Good
inspected July 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
204 ft
2 main spans
Daily traffic
200
2020 count
Owner
State
State Highway Agency

About this bridge

SR1578 over I-540 is a prestressed concrete stringer/multi-beam or girder carrying SR1578 over I-540 in Wake County, North Carolina. It was built in 2022, so it is 3 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 9 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 200 vehicles a day, roughly 7% of them trucks, projected to reach 400 by 2040. The structure is 204 ft (62.1 m) long and 43 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesSR1578
CrossesI-540
Location0.1.MI.S.JCT.BUCKWOOD Dr.
RouteState Highway 1578
Coordinates35.67182, -78.73312
Functional classUrban Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck9 ExcellentNo problems noted.
Superstructure9 ExcellentNo problems noted.
Substructure9 ExcellentNo problems noted.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation9: Superior to present desirable criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating81.9 US tons
Inventory rating60 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadHL 93
Structure length204 ft (62.1 m)
Longest span99 ft (30.1 m)
Deck width43 ft (13.2 m)
Roadway width39 ft (11.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic200 (2020)
Projected traffic400 by 2040
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed0.6 mi (1 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 SR1578 over I-540 built?

It was built in 2022, making it 3 years old in 2025.

What condition is SR1578 over I-540 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 July 2023.

How much traffic does SR1578 over I-540 carry?

About 200 vehicles per day (2020 count), of which roughly 7% are trucks.

How long is SR1578 over I-540?

The structure is 204 ft (62.1 m) long with a longest span of 99 ft (30.1 m) and a deck 43 ft wide.

Who owns SR1578 over I-540?

It is owned by the State Highway Agency.