US Bridges

US501N over I85 US15 US70

Good

Durham County, North Carolina · 1.23 MI S. of JCT SR1407 · Structure no. 000000000630010

Built
2006
19 years old
Condition
Good
inspected November 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
373 ft
4 main spans
Daily traffic
5,250
2021 count
Owner
State
State Highway Agency

About this bridge

US501N over I85 US15 US70 is a steel continuous stringer/multi-beam or girder carrying US501N over I85 US15 US70 in Durham County, North Carolina. It was built in 2006, so it is 19 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 5,250 vehicles a day, roughly 12% of them trucks, projected to reach 10,500 by 2040. The structure is 373 ft (113.6 m) long and 59 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesUS501N
CrossesI85 US15 US70
Location1.23 MI S. of JCT SR1407
RouteU.S. Route 501
Coordinates36.02058, -78.90525
Functional classUrban Other Principal 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.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99 US tons
Inventory rating74 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20 + Mod
Structure length373 ft (113.6 m)
Longest span114 ft (34.7 m)
Deck width59 ft (17.9 m)
Roadway width51 ft (15.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,250 (2021)
Projected traffic10,500 by 2040
Trucks12%
Lanes on structure4
Traffic directionOne-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemYes

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 US501N over I85 US15 US70 built?

It was built in 2006, making it 19 years old in 2025.

What condition is US501N over I85 US15 US70 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 November 2023.

How much traffic does US501N over I85 US15 US70 carry?

About 5,250 vehicles per day (2021 count), of which roughly 12% are trucks.

How long is US501N over I85 US15 US70?

The structure is 373 ft (113.6 m) long with a longest span of 114 ft (34.7 m) and a deck 59 ft wide.

Who owns US501N over I85 US15 US70?

It is owned by the State Highway Agency.