US Bridges

SR1645 over I540

Good

Wake County, North Carolina · 0.68 Mi. E. Jct. SR1646 · Structure no. 000000001830691

Built
1996
29 years old
Condition
Good
inspected September 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
352 ft
2 main spans
Daily traffic
9,000
2021 count
Owner
State
State Highway Agency

About this bridge

SR1645 over I540 is a steel continuous stringer/multi-beam or girder carrying SR1645 over I540 in Wake County, North Carolina. It was built in 1996, so it is 29 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 9,000 vehicles a day, roughly 6% of them trucks, projected to reach 18,000 by 2040. The structure is 352 ft (107.2 m) long and 81 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesSR1645
CrossesI540
Location0.68 Mi. E. Jct. SR1646
RouteState Highway 1645
Coordinates35.8986, -78.78426
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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating68.9 US tons
Inventory rating40.9 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2 (+2 approach)
Design loadHS 20 + Mod
Structure length352 ft (107.2 m)
Longest span122 ft (37.1 m)
Deck width81 ft (24.7 m)
Roadway width78 ft (23.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,000 (2021)
Projected traffic18,000 by 2040
Trucks6%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
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 SR1645 over I540 built?

It was built in 1996, making it 29 years old in 2025.

What condition is SR1645 over I540 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 September 2023.

How much traffic does SR1645 over I540 carry?

About 9,000 vehicles per day (2021 count), of which roughly 6% are trucks.

How long is SR1645 over I540?

The structure is 352 ft (107.2 m) long with a longest span of 122 ft (37.1 m) and a deck 81 ft wide.

Who owns SR1645 over I540?

It is owned by the State Highway Agency.