US421 Sbl Ramp over I40 I40 Bus US421
GoodForsyth County, North Carolina · 1.2 Mi. N. Jct. US158 · Structure no. 000000000670444
- Built
- 1990
- 35 years old
- Condition
- Good
- inspected September 2024
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 592 ft
- 6 main spans
- Daily traffic
- 10,000
- 2022 count
- Owner
- State
- State Highway Agency
About this bridge
US421 Sbl Ramp over I40 I40 Bus US421 is a steel continuous stringer/multi-beam or girder carrying US421 Sbl Ramp over I40 I40 Bus US421 in Forsyth County, North Carolina. It was built in 1990, so it is 35 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 10,000 vehicles a day, roughly 12% of them trucks, projected to reach 20,000 by 2040. The structure is 592 ft (180.4 m) long and 51 ft wide. If it were closed, the detour would be 0.6 mi (1 km).
Location
Open in Google MapsCondition and inspection
All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| Superstructure | 8 Very Good | No problems noted. |
| Substructure | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was US421 Sbl Ramp over I40 I40 Bus US421 built?
It was built in 1990, making it 35 years old in 2025.
What condition is US421 Sbl Ramp over I40 I40 Bus US421 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 September 2024.
How much traffic does US421 Sbl Ramp over I40 I40 Bus US421 carry?
About 10,000 vehicles per day (2022 count), of which roughly 12% are trucks.
How long is US421 Sbl Ramp over I40 I40 Bus US421?
The structure is 592 ft (180.4 m) long with a longest span of 134 ft (40.8 m) and a deck 51 ft wide.
Who owns US421 Sbl Ramp over I40 I40 Bus US421?
It is owned by the State Highway Agency.