Is INTERSTATE 405 Safe?
INTERSTATE 405 in California has a Condition Score of 69/100 (Grade B). The deck is rated 7/9, superstructure 7/9, and substructure 7/9. The bridge is not structurally deficient. Built in 1959 (67 years old), it carries 283K vehicles per day.
Condition Ratings
| Component | Rating | Scale |
|---|---|---|
| Deck | 7 | /9 |
| Superstructure | 7 | /9 |
| Substructure | 7 | /9 |
| Overall Score | 69/100 | Grade B |
Bridge Details
Year Built
1959
Daily Traffic
283K
Length
34.7m
Structurally Deficient
No
Data from the FHWA National Bridge Inventory. Last updated April 2026.