US Bridges

I-85RAMP over I-85 I-73 US421N

Good

Guilford County, North Carolina · 0.2 Mi. N. Jct. I85 Bus · Structure no. 000000000810876

Built
2008
17 years old
Condition
Good
inspected April 2022
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
504 ft
4 main spans
Daily traffic
22,500
2019 count
Owner
State
State Highway Agency

About this bridge

I-85RAMP over I-85 I-73 US421N is a steel continuous stringer/multi-beam or girder carrying I-85RAMP over I-85 I-73 US421N 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 22,500 vehicles a day, roughly 16% of them trucks, projected to reach 45,000 by 2040. The structure is 504 ft (153.6 m) long and 52 ft wide.

Location

Open in Google Maps
CarriesI-85RAMP
CrossesI-85 I-73 US421N
Location0.2 Mi. N. Jct. I85 Bus
RouteInterstate 85
CountyGuilford County
StateNorth Carolina
Coordinates36.00387, -79.84606
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 inspectionApril 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating91.9 US tons
Inventory rating54.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20 + Mod
Structure length504 ft (153.6 m)
Longest span144 ft (43.8 m)
Deck width52 ft (15.9 m)
Roadway width49 ft (14.9 m)
Vertical clearance over deck19 ft (5.7 m)

Traffic and service

Average daily traffic22,500 (2019)
Projected traffic45,000 by 2040
Trucks16%
Lanes on structure3
Traffic directionOne-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed—
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 proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-85RAMP over I-85 I-73 US421N built?

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

What condition is I-85RAMP over I-85 I-73 US421N 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 April 2022.

How much traffic does I-85RAMP over I-85 I-73 US421N carry?

About 22,500 vehicles per day (2019 count), of which roughly 16% are trucks.

How long is I-85RAMP over I-85 I-73 US421N?

The structure is 504 ft (153.6 m) long with a longest span of 144 ft (43.8 m) and a deck 52 ft wide.

Who owns I-85RAMP over I-85 I-73 US421N?

It is owned by the State Highway Agency.