US Bridges

SR1106 over I40

Fair

Durham County, North Carolina · 0.3 MI.N.JCT.NC54 · Structure no. 000000000630309

Built
1985
40 years old
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
187 ft
2 main spans
Daily traffic
10,000
2018 count
Owner
State
State Highway Agency

About this bridge

SR1106 over I40 is a steel stringer/multi-beam or girder carrying SR1106 over I40 in Durham County, North Carolina. It was built in 1985, so it is 40 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 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 10,000 vehicles a day, roughly 7% of them trucks, projected to reach 20,000 by 2040. The structure is 187 ft (56.9 m) long and 30 ft wide. If it were closed, the detour would be 5.6 mi (9 km).

Location

Open in Google Maps
CarriesSR1106
CrossesI40
Location0.3 MI.N.JCT.NC54
RouteState Highway 1106
CountyDurham County
StateNorth Carolina
Coordinates35.90878, -78.91642
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99 US tons
Inventory rating70 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
Structure length187 ft (56.9 m)
Longest span94 ft (28.6 m)
Deck width30 ft (9.2 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,000 (2018)
Projected traffic20,000 by 2040
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed5.6 mi (9 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was SR1106 over I40 built?

It was built in 1985, making it 40 years old in 2025.

What condition is SR1106 over I40 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 2023.

How much traffic does SR1106 over I40 carry?

About 10,000 vehicles per day (2018 count), of which roughly 7% are trucks.

How long is SR1106 over I40?

The structure is 187 ft (56.9 m) long with a longest span of 94 ft (28.6 m) and a deck 30 ft wide.

Who owns SR1106 over I40?

It is owned by the State Highway Agency.