US Bridges

I85N US15/501 US70 over US15/501 Bus

Good

Durham County, North Carolina · 0.19 M. S. Jct. NC55 · Structure no. 000000000630161

Built
2005
20 years old
Condition
Good
inspected June 2021
Type
Stringer/Multi-beam or Girder
Steel
Length
201 ft
3 main spans
Daily traffic
49,250
2018 count
Owner
State
State Highway Agency

About this bridge

I85N US15/501 US70 over US15/501 Bus is a steel stringer/multi-beam or girder carrying I85N US15/501 US70 over US15/501 Bus in Durham County, North Carolina. It was built in 2005, so it is 20 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 49,250 vehicles a day, roughly 16% of them trucks, projected to reach 98,500 by 2040. The structure is 201 ft (61.2 m) long and 74 ft wide.

CarriesI85N US15/501 US70
CrossesUS15/501 Bus
Location0.19 M. S. Jct. NC55
RouteInterstate 85
Coordinates36.01458, -78.89053
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.
Substructure8 Very GoodNo problems noted.
Last inspectionJune 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation8: Equal to present desirable criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating79.9 US tons
Inventory rating48 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length201 ft (61.2 m)
Longest span113 ft (34.4 m)
Deck width74 ft (22.5 m)
Roadway width71 ft (21.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic49,250 (2018)
Projected traffic98,500 by 2040
Trucks16%
Lanes on structure4
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 US15/501 US70 over US15/501 Bus built?

It was built in 2005, making it 20 years old in 2025.

What condition is I85N US15/501 US70 over US15/501 Bus 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 June 2021.

How much traffic does I85N US15/501 US70 over US15/501 Bus carry?

About 49,250 vehicles per day (2018 count), of which roughly 16% are trucks.

How long is I85N US15/501 US70 over US15/501 Bus?

The structure is 201 ft (61.2 m) long with a longest span of 113 ft (34.4 m) and a deck 74 ft wide.

Who owns I85N US15/501 US70 over US15/501 Bus?

It is owned by the State Highway Agency.