Interstate 5 SB over 18th Street
FairSan Diego County, California · 11-SD-005-R10.43-NATC · Structure no. 57 0252L
- Built
- 1965
- 60 years old, rebuilt 2007
- Condition
- Fair
- inspected April 2023
- Type
- Slab
- Concrete Continuous
- Length
- 110 ft
- 3 main spans
- Daily traffic
- 82,000
- 2020 count
- Owner
- State
- State Highway Agency
About this bridge
Interstate 5 SB over 18th Street is a concrete continuous slab carrying Interstate 5 SB over 18th Street in San Diego County, California. It was built in 1965 and reconstructed in 2007, so it is 60 years old, older than the California average of 54.8 years.
The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 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 82,000 vehicles a day, roughly 5% of them trucks, projected to reach 117,466 by 2040. The structure is 110 ft (33.5 m) long and 80 ft wide. If it were closed, the detour would be 1.2 mi (2 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Superstructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Substructure | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Interstate 5 SB over 18th Street built?
It was built in 1965, making it 60 years old in 2025. It was reconstructed in 2007.
What condition is Interstate 5 SB over 18th Street 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 2023.
How much traffic does Interstate 5 SB over 18th Street carry?
About 82,000 vehicles per day (2020 count), of which roughly 5% are trucks.
How long is Interstate 5 SB over 18th Street?
The structure is 110 ft (33.5 m) long with a longest span of 40 ft (12.2 m) and a deck 80 ft wide.
Who owns Interstate 5 SB over 18th Street?
It is owned by the State Highway Agency.