SH 121 SB over Custer RD (fm 2478)
GoodCollin County, Texas · 5.5 MI W of US 75 · Structure no. 180430036404136
- Built
- 2005
- 20 years old, rebuilt 2008
- Condition
- Good
- inspected October 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 321 ft
- 3 main spans
- Daily traffic
- 90,861
- 2023 count
- Owner
- Toll Authority
- Local Toll Authority
About this bridge
SH 121 SB over Custer RD (fm 2478) is a prestressed concrete stringer/multi-beam or girder carrying SH 121 SB over Custer RD (fm 2478) in Collin County, Texas. It was built in 2005 and reconstructed in 2008, so it is 20 years old, younger than the Texas average of 44.4 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 90,861 vehicles a day, roughly 9% of them trucks, projected to reach 38,934 by 2040. The structure is 321 ft (97.8 m) long and 70 ft wide.
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 | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was SH 121 SB over Custer RD (fm 2478) built?
It was built in 2005, making it 20 years old in 2025. It was reconstructed in 2008.
What condition is SH 121 SB over Custer RD (fm 2478) 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 October 2023.
How much traffic does SH 121 SB over Custer RD (fm 2478) carry?
About 90,861 vehicles per day (2023 count), of which roughly 9% are trucks.
How long is SH 121 SB over Custer RD (fm 2478)?
The structure is 321 ft (97.8 m) long with a longest span of 121 ft (36.9 m) and a deck 70 ft wide.
Who owns SH 121 SB over Custer RD (fm 2478)?
It is owned by the Local Toll Authority.