STATE ROUTE 55
STATE ROUTE 55 in 12-Ora-055-13.60-Tus, Orange County, California received a condition grade of B (78/100). Built in 2001, the bridge carries 247K vehicles daily on STATE ROUTE 55 over Chapman Avenue.
STATE ROUTE 55 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 2001, making it 25 years old — past the early-life period but still well within typical service life. Routine inspections and modest repair work are normal for bridges in this age band. STATE ROUTE 55 carries an average daily traffic count of 247,000 vehicles, with 14 lane(s) crossing Chapman Avenue. 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
STATE ROUTE 55 is a 25-year-old bridge located 12-Ora-055-13.60-Tus in Orange County, California. The bridge carries STATE ROUTE 55 over Chapman Avenue with 14 traffic lanes, handling approximately 247K vehicles per day. Built in 2001, the structure spans 59.3 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
STATE ROUTE 55 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.
STATE ROUTE 55 was built in 2001, making it 25 years old. The average bridge age in the United States is 48 years.
STATE ROUTE 55 carries approximately 247K vehicles per day (average daily traffic). The bridge has 14 traffic lanes. It is 59.3 meters long and located on STATE ROUTE 55 in 12-Ora-055-13.60-Tus, Orange County, California.
No, STATE ROUTE 55 is not classified as structurally deficient. All three primary components (deck, superstructure, and substructure) are rated above 4 on the 0-9 NBI scale.
STATE ROUTE 55 is located 12-Ora-055-13.60-Tus in Orange County, California. The bridge carries STATE ROUTE 55 over Chapman Avenue. Its coordinates are 33.787578, -117.830678. It is maintained by State Highway Agency.
STATE ROUTE 55 carries STATE ROUTE 55 over Chapman Avenue. The bridge is 59.3 meters long and was built in 2001.
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.