Interstate 15 SB over Mercy Road
GoodSan Diego County, California · 11-SD-015-M17.31-SD · Structure no. 57 0535L
- Built
- 1975
- 50 years old, rebuilt 2009
- Condition
- Good
- inspected September 2023
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete
- Length
- 147 ft
- 1 main span
- Daily traffic
- 148,000
- 2019 count
- Owner
- State
- State Highway Agency
About this bridge
Interstate 15 SB over Mercy Road is a prestressed concrete box beam or girders - multiple carrying Interstate 15 SB over Mercy Road in San Diego County, California. It was built in 1975 and reconstructed in 2009, so it is 50 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 148,000 vehicles a day, roughly 6% of them trucks, projected to reach 161,915 by 2041. The structure is 147 ft (44.8 m) long and 158 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 | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Interstate 15 SB over Mercy Road built?
It was built in 1975, making it 50 years old in 2025. It was reconstructed in 2009.
What condition is Interstate 15 SB 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 SB over Mercy Road carry?
About 148,000 vehicles per day (2019 count), of which roughly 6% are trucks.
How long is Interstate 15 SB over Mercy Road?
The structure is 147 ft (44.8 m) long with a longest span of 146 ft (44.5 m) and a deck 158 ft wide.
Who owns Interstate 15 SB over Mercy Road?
It is owned by the State Highway Agency.