I 10
I 10 in 0.3 MI E JCT I 17, Maricopa County, Arizona received a condition grade of B (74/100). Built in 1988, the bridge carries 162K vehicles daily on I 10 over 24th Street.
I 10 carries a B on the BridgeSafety Condition Score with 74/100. 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 1988, making it 38 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. I 10 carries an average daily traffic count of 161,774 vehicles, with 13 lane(s) crossing 24th Street. 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
I 10 is a 38-year-old bridge located 0.3 MI E JCT I 17 in Maricopa County, Arizona. The bridge carries I 10 over 24th Street with 13 traffic lanes, handling approximately 162K vehicles per day. Built in 1988, the structure spans 40.2 meters.
The bridge received a Condition Grade of B (74/100) based on Federal Highway Administration inspection data. Its deck is rated 6/9 (fair), superstructure 7/9 (good), and substructure 7/9 (good).
This bridge is owned and maintained by State Highway Agency.
Location Map
Frequently Asked Questions
I 10 has a Condition Score of 74/100 (Grade B). Its deck is rated 6/9, superstructure 7/9, and substructure 7/9 on the NBI scale. The bridge is not classified as structurally deficient.
I 10 was built in 1988, making it 38 years old. The average bridge age in the United States is 48 years.
I 10 carries approximately 162K vehicles per day (average daily traffic). The bridge has 13 traffic lanes. It is 40.2 meters long and located on I 10 in 0.3 MI E JCT I 17, Maricopa County, Arizona.
No, I 10 is not classified as structurally deficient. All three primary components (deck, superstructure, and substructure) are rated above 4 on the 0-9 NBI scale.
I 10 is located 0.3 MI E JCT I 17 in Maricopa County, Arizona. The bridge carries I 10 over 24th Street. Its coordinates are 33.431300, -112.037300. It is maintained by State Highway Agency.
I 10 carries I 10 over 24th Street. The bridge is 40.2 meters long and was built in 1988.
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.