I-285
I-285 in 4.3 MI SE Of Smyrna, Cobb County, Georgia received a condition grade of B (74/100). Built in 1969, the bridge carries 153K vehicles daily on I-285 over M-9325 Church Road.
I-285 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 1969 and is now 57 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. I-285 carries an average daily traffic count of 153,000 vehicles, with 8 lane(s) crossing M-9325 Church Road. 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-285 is a 57-year-old bridge located 4.3 MI SE Of Smyrna in Cobb County, Georgia. The bridge carries I-285 over M-9325 Church Road with 8 traffic lanes, handling approximately 153K vehicles per day. Built in 1969 and reconstructed in 1983, the structure spans 68.3 meters.
The bridge received a Condition Grade of B (74/100) 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
I-285 has a Condition Score of 74/100 (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.
I-285 was built in 1969 and reconstructed in 1983, making it 57 years old. The average bridge age in the United States is 48 years.
I-285 carries approximately 153K vehicles per day (average daily traffic). The bridge has 8 traffic lanes. It is 68.3 meters long and located on I-285 in 4.3 MI SE Of Smyrna, Cobb County, Georgia.
No, I-285 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-285 is located 4.3 MI SE Of Smyrna in Cobb County, Georgia. The bridge carries I-285 over M-9325 Church Road. Its coordinates are 33.829853, -84.486336. It is maintained by State Highway Agency.
I-285 carries I-285 over M-9325 Church Road. The bridge is 68.3 meters long and was built in 1969, with reconstruction in 1983.
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.