US Bridges

I-285 over CSX Railroad (639140W)

Good

Cobb County, Georgia · 3.7 MI SE of Smyrna · Structure no. 000000006700970

Built
1968
57 years old, rebuilt 1983
Condition
Good
inspected March 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
134 ft
1 main span
Daily traffic
153,000
2024 count
Owner
State
State Highway Agency

About this bridge

I-285 over CSX Railroad (639140W) is a steel stringer/multi-beam or girder carrying I-285 over CSX Railroad (639140W) in Cobb County, Georgia. It was built in 1968 and reconstructed in 1983, so it is 57 years old, older than the Georgia average of 47.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 153,000 vehicles a day, roughly 1% of them trucks, projected to reach 210,765 by 2032. The structure is 134 ft (40.8 m) long and 134 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesI-285
CrossesCSX Railroad (639140W)
Location3.7 MI SE of Smyrna
RouteInterstate 285
CountyCobb County
StateGeorgia
Coordinates33.83937, -84.48714
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99 US tons
Inventory rating62.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length134 ft (40.8 m)
Longest span134 ft (40.8 m)
Deck width134 ft (40.9 m)
Roadway width131 ft (39.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic153,000 (2024)
Projected traffic210,765 by 2032
Trucks1%
Lanes on structure10
Traffic directionTwo-way traffic
CarriesHighway
CrossesRailroad
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-285 over CSX Railroad (639140W) built?

It was built in 1968, making it 57 years old in 2025. It was reconstructed in 1983.

What condition is I-285 over CSX Railroad (639140W) in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in March 2023.

How much traffic does I-285 over CSX Railroad (639140W) carry?

About 153,000 vehicles per day (2024 count), of which roughly 1% are trucks.

How long is I-285 over CSX Railroad (639140W)?

The structure is 134 ft (40.8 m) long with a longest span of 134 ft (40.8 m) and a deck 134 ft wide.

Who owns I-285 over CSX Railroad (639140W)?

It is owned by the State Highway Agency.