INTERSTATE 5
INTERSTATE 5 in 11-Sd-005-R16.02-Sd, San Diego County, California received a condition grade of C (59/100). Built in 1961, the bridge carries 199K vehicles daily on INTERSTATE 5 over Rte 163 Connectors. It is classified as structurally deficient.
INTERSTATE 5 carries a C on the BridgeSafety Condition Score with 59/100. Component ratings sit in the middle of the FHWA NBI distribution; rehabilitation programming is likely on the owning agency’s medium-term horizon.
The bridge was built in 1961 and is now 65 years old, at or past the typical 50-year design life for bridges of its vintage. Maintenance and inspection cycles are correspondingly more involved than for newer structures. INTERSTATE 5 carries an average daily traffic count of 199,000 vehicles, with 11 lane(s) crossing Rte 163 Connectors. The owning agency is State Highway Agency; bridge inspection records flow into the federal NBI database annually.
Component Ratings
The riding surface, evaluated for cracking, spalling, and wear
Beams, girders, and trusses that support the deck
Piers, abutments, and foundations below the deck
Bridge Details
About This Bridge
INTERSTATE 5 is a 65-year-old bridge located 11-Sd-005-R16.02-Sd in San Diego County, California. The bridge carries INTERSTATE 5 over Rte 163 Connectors with 11 traffic lanes, handling approximately 199K vehicles per day. Built in 1961 and reconstructed in 1985, the structure spans 137.2 meters.
The bridge received a Condition Grade of C (59/100) based on Federal Highway Administration inspection data. Its deck is rated 4/9 (poor), superstructure 7/9 (good), and substructure 7/9 (good). The bridge is classified as structurally deficient, meaning at least one major component is rated 4 or below, this signals a need for repair or replacement but does not necessarily indicate an immediate safety hazard.
This bridge is owned and maintained by State Highway Agency.
Location Map
Frequently Asked Questions
INTERSTATE 5 has a Condition Score of 59/100 (Grade C). Its deck is rated 4/9, superstructure 7/9, and substructure 7/9 on the NBI scale. The bridge is classified as structurally deficient.
INTERSTATE 5 was built in 1961 and reconstructed in 1985, making it 65 years old. The average bridge age in the United States is 48 years.
INTERSTATE 5 carries approximately 199K vehicles per day (average daily traffic). The bridge has 11 traffic lanes. It is 137.2 meters long and located on INTERSTATE 5 in 11-Sd-005-R16.02-Sd, San Diego County, California.
Yes, INTERSTATE 5 is classified as structurally deficient because at least one of its primary components (deck, superstructure, or substructure) is rated 4 or below on the 0-9 NBI scale. This does not necessarily mean it is unsafe, but it requires significant repair or replacement.
INTERSTATE 5 is located 11-Sd-005-R16.02-Sd in San Diego County, California. The bridge carries INTERSTATE 5 over Rte 163 Connectors. Its coordinates are 32.724375, -117.154686. It is maintained by State Highway Agency.
INTERSTATE 5 carries INTERSTATE 5 over Rte 163 Connectors. The bridge is 137.2 meters long and was built in 1961, with reconstruction in 1985.
Condition Score is calculated from deck (33%), superstructure (33%), and substructure (34%) NBI ratings with an age penalty for bridges over 50 years.
Source: FHWA National Bridge Inventory, 2026.