US Bridges

SR3977 over US1 US64

Fair

Wake County, North Carolina · 1.6 Mi. E. Jct. SR1300 · Structure no. 000000001830635

Built
1987
38 years old
Condition
Fair
inspected May 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
215 ft
2 main spans
Daily traffic
21,500
2021 count
Owner
State
State Highway Agency

About this bridge

SR3977 over US1 US64 is a steel stringer/multi-beam or girder carrying SR3977 over US1 US64 in Wake County, North Carolina. It was built in 1987, so it is 38 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 fair condition with a lowest component rating of 6 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 21,500 vehicles a day, roughly 6% of them trucks, projected to reach 43,000 by 2040. The structure is 215 ft (65.5 m) long and 100 ft wide.

CarriesSR3977
CrossesUS1 US64
Location1.6 Mi. E. Jct. SR1300
RouteState Highway 3977
Coordinates35.74856, -78.77181
Functional classUrban Minor Arterial

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99 US tons
Inventory rating73 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
Structure length215 ft (65.5 m)
Longest span106 ft (32.3 m)
Deck width100 ft (30.4 m)
Roadway width87 ft (26.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic21,500 (2021)
Projected traffic43,000 by 2040
Trucks6%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed—
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 SR3977 over US1 US64 built?

It was built in 1987, making it 38 years old in 2025.

What condition is SR3977 over US1 US64 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 May 2023.

How much traffic does SR3977 over US1 US64 carry?

About 21,500 vehicles per day (2021 count), of which roughly 6% are trucks.

How long is SR3977 over US1 US64?

The structure is 215 ft (65.5 m) long with a longest span of 106 ft (32.3 m) and a deck 100 ft wide.

Who owns SR3977 over US1 US64?

It is owned by the State Highway Agency.