US Bridges

SR1556 over I40 & US421

Fair

Guilford County, North Carolina · 0.9 Mi. N. Jct. NC68 · Structure no. 000000000810153

Built
2003
22 years old
Condition
Fair
inspected April 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
199 ft
2 main spans
Daily traffic
15,500
2021 count
Owner
State
State Highway Agency

About this bridge

SR1556 over I40 & US421 is a steel stringer/multi-beam or girder carrying SR1556 over I40 & US421 in Guilford County, North Carolina. It was built in 2003, so it is 22 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 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 15,500 vehicles a day, roughly 6% of them trucks, projected to reach 31,000 by 2040. The structure is 199 ft (60.6 m) long and 170 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesSR1556
CrossesI40 & US421
Location0.9 Mi. N. Jct. NC68
RouteState Highway 1556
CountyGuilford County
StateNorth Carolina
Coordinates36.07505, -79.94237
Functional classUrban Minor Arterial

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 inspectionApril 2024
Inspection intervalevery 24 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 rating99 US tons
Inventory rating76.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
Structure length199 ft (60.6 m)
Longest span104 ft (31.6 m)
Deck width170 ft (51.9 m)
Roadway width152 ft (46.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15,500 (2021)
Projected traffic31,000 by 2040
Trucks6%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed1.9 mi (3 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 proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was SR1556 over I40 & US421 built?

It was built in 2003, making it 22 years old in 2025.

What condition is SR1556 over I40 & US421 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 April 2024.

How much traffic does SR1556 over I40 & US421 carry?

About 15,500 vehicles per day (2021 count), of which roughly 6% are trucks.

How long is SR1556 over I40 & US421?

The structure is 199 ft (60.6 m) long with a longest span of 104 ft (31.6 m) and a deck 170 ft wide.

Who owns SR1556 over I40 & US421?

It is owned by the State Highway Agency.