US Bridges

I-285 over I-85- I-85 Ramp

Fair

DeKalb County, Georgia · 2.4 MI E of Chamblee · Structure no. 000000008900770

Built
1968
57 years old, rebuilt 1985
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
263 ft
4 main spans
Daily traffic
219,000
2024 count
Owner
State
State Highway Agency

About this bridge

I-285 over I-85- I-85 Ramp is a steel continuous stringer/multi-beam or girder carrying I-285 over I-85- I-85 Ramp in DeKalb County, Georgia. It was built in 1968 and reconstructed in 1985, 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 fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 219,000 vehicles a day, roughly 1% of them trucks, projected to reach 260,099 by 2031. The structure is 263 ft (80.2 m) long and 148 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesI-285
CrossesI-85- I-85 Ramp
Location2.4 MI E of Chamblee
RouteInterstate 285
CountyDeKalb County
StateGeorgia
Coordinates33.89184, -84.25922
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36.9 US tons
Inventory rating21.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20 + Mod
Structure length263 ft (80.2 m)
Longest span73 ft (22.3 m)
Deck width148 ft (45.2 m)
Roadway width145 ft (44.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic219,000 (2024)
Projected traffic260,099 by 2031
Trucks1%
Lanes on structure7
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 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$3.6 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-285 over I-85- I-85 Ramp built?

It was built in 1968, making it 57 years old in 2025. It was reconstructed in 1985.

What condition is I-285 over I-85- I-85 Ramp in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in July 2024.

How much traffic does I-285 over I-85- I-85 Ramp carry?

About 219,000 vehicles per day (2024 count), of which roughly 1% are trucks.

How long is I-285 over I-85- I-85 Ramp?

The structure is 263 ft (80.2 m) long with a longest span of 73 ft (22.3 m) and a deck 148 ft wide.

Who owns I-285 over I-85- I-85 Ramp?

It is owned by the State Highway Agency.