INTERSTATE 5
INTERSTATE 5 in 07-La-005-R53.33-Scta, Los Angeles County, California received a condition grade of B (78/100). Built in 2005, the bridge carries 149K vehicles daily on INTERSTATE 5 over Magic Mountain Parkway.
INTERSTATE 5 carries a B on the BridgeSafety Condition Score with 78/100. Most component ratings are solid; one or two may show wear consistent with the structure’s age, but the bridge is not flagged as structurally deficient.
The bridge was built in 2005 and is 21 years old — relatively young against the U.S. bridge stock. Modern bridges built to current FHWA standards generally outperform older structures on condition ratings. INTERSTATE 5 carries an average daily traffic count of 148,959 vehicles, with 8 lane(s) crossing Magic Mountain Parkway. 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 21-year-old bridge located 07-La-005-R53.33-Scta in Los Angeles County, California. The bridge carries INTERSTATE 5 over Magic Mountain Parkway with 8 traffic lanes, handling approximately 149K vehicles per day. Built in 2005, the structure spans 94 meters.
The bridge received a Condition Grade of B (78/100) based on Federal Highway Administration inspection data. Its deck is rated 7/9 (good), superstructure 7/9 (good), and substructure 7/9 (good).
This bridge is owned and maintained by State Highway Agency.
Location Map
Frequently Asked Questions
INTERSTATE 5 has a Condition Score of 78/100 (Grade B). Its deck is rated 7/9, superstructure 7/9, and substructure 7/9 on the NBI scale. The bridge is not classified as structurally deficient.
INTERSTATE 5 was built in 2005, making it 21 years old. The average bridge age in the United States is 48 years.
INTERSTATE 5 carries approximately 149K vehicles per day (average daily traffic). The bridge has 8 traffic lanes. It is 94 meters long and located on INTERSTATE 5 in 07-La-005-R53.33-Scta, Los Angeles County, California.
No, INTERSTATE 5 is not classified as structurally deficient. All three primary components (deck, superstructure, and substructure) are rated above 4 on the 0-9 NBI scale.
INTERSTATE 5 is located 07-La-005-R53.33-Scta in Los Angeles County, California. The bridge carries INTERSTATE 5 over Magic Mountain Parkway. Its coordinates are 34.423008, -118.582953. It is maintained by State Highway Agency.
INTERSTATE 5 carries INTERSTATE 5 over Magic Mountain Parkway. The bridge is 94 meters long and was built in 2005.
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.