Interstate 15 NB over Mercy Road
GoodSan Diego County, California · 11-SD-015-M17.31-SD · Structure no. 57 0535R
- Built
- 1978
- 47 years old, rebuilt 1993
- Condition
- Good
- inspected September 2023
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete
- Length
- 132 ft
- 1 main span
- Daily traffic
- 128,000
- 2019 count
- Owner
- State
- State Highway Agency
About this bridge
Interstate 15 NB over Mercy Road is a prestressed concrete box beam or girders - multiple carrying Interstate 15 NB over Mercy Road in San Diego County, California. It was built in 1978 and reconstructed in 1993, so it is 47 years old, younger than the California average of 54.8 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 128,000 vehicles a day, roughly 6% of them trucks, projected to reach 151,915 by 2041. The structure is 132 ft (40.2 m) long and 81 ft wide. If it were closed, the detour would be 1.2 mi (2 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 | 7 Good | Some minor problems. |
| Substructure | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Interstate 15 NB over Mercy Road built?
It was built in 1978, making it 47 years old in 2025. It was reconstructed in 1993.
What condition is Interstate 15 NB over Mercy Road 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 2023.
How much traffic does Interstate 15 NB over Mercy Road carry?
About 128,000 vehicles per day (2019 count), of which roughly 6% are trucks.
How long is Interstate 15 NB over Mercy Road?
The structure is 132 ft (40.2 m) long with a longest span of 132 ft (40.2 m) and a deck 81 ft wide.
Who owns Interstate 15 NB over Mercy Road?
It is owned by the State Highway Agency.