US Bridges

I85N.COLL over I74 US311

Good

Guilford County, North Carolina · 0.7 Mi. N. Jct. NC62 · Structure no. 000000000810976

Built
2008
17 years old
Condition
Good
inspected May 2022
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
274 ft
2 main spans
Daily traffic
34,250
2019 count
Owner
State
State Highway Agency

About this bridge

I85N.COLL over I74 US311 is a steel continuous stringer/multi-beam or girder carrying I85N.COLL over I74 US311 in Guilford County, North Carolina. It was built in 2008, so it is 17 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 34,250 vehicles a day, roughly 16% of them trucks, projected to reach 68,500 by 2040. The structure is 274 ft (83.5 m) long and 40 ft wide.

Location

Open in Google Maps
CarriesI85N.COLL
CrossesI74 US311
Location0.7 Mi. N. Jct. NC62
RouteInterstate 85
CountyGuilford County
StateNorth Carolina
Coordinates35.92865, -79.92424
Functional classUrban Principal Arterial - Interstate

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.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Last inspectionMay 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99 US tons
Inventory rating68.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
Structure length274 ft (83.5 m)
Longest span138 ft (42 m)
Deck width40 ft (12.3 m)
Roadway width37 ft (11.3 m)
Vertical clearance over deck0 ft (0 m)

Traffic and service

Average daily traffic34,250 (2019)
Projected traffic68,500 by 2040
Trucks16%
Lanes on structure2
Traffic directionOne-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed—
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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 I85N.COLL over I74 US311 built?

It was built in 2008, making it 17 years old in 2025.

What condition is I85N.COLL over I74 US311 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 May 2022.

How much traffic does I85N.COLL over I74 US311 carry?

About 34,250 vehicles per day (2019 count), of which roughly 16% are trucks.

How long is I85N.COLL over I74 US311?

The structure is 274 ft (83.5 m) long with a longest span of 138 ft (42 m) and a deck 40 ft wide.

Who owns I85N.COLL over I74 US311?

It is owned by the State Highway Agency.