US Bridges

I-285 over Rmp I-285 Ccbl to I-75S

Fair

Cobb County, Georgia · 6.7 MI SE of Marietta · Structure no. 000000006701000

Built
1978
47 years old, rebuilt 2015
Condition
Fair
inspected June 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
212 ft
3 main spans
Daily traffic
164,000
2024 count
Owner
State
State Highway Agency

About this bridge

I-285 over Rmp I-285 Ccbl to I-75S is a steel continuous stringer/multi-beam or girder carrying I-285 over Rmp I-285 Ccbl to I-75S in Cobb County, Georgia. It was built in 1978 and reconstructed in 2015, so it is 47 years old, younger 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 6 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 164,000 vehicles a day, roughly 5% of them trucks, projected to reach 119,505 by 2032. The structure is 212 ft (64.6 m) long and 122 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI-285
CrossesRmp I-285 Ccbl to I-75S
Location6.7 MI SE of Marietta
RouteInterstate 285
CountyCobb County
StateGeorgia
Coordinates33.88923, -84.46269
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59 US tons
Inventory rating34.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3 (+2 approach)
Design loadHS 20 + Mod
Structure length212 ft (64.6 m)
Longest span123 ft (37.5 m)
Deck width122 ft (37.1 m)
Roadway width108 ft (32.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic164,000 (2024)
Projected traffic119,505 by 2032
Trucks5%
Lanes on structure5
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$2.3 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-285 over Rmp I-285 Ccbl to I-75S built?

It was built in 1978, making it 47 years old in 2025. It was reconstructed in 2015.

What condition is I-285 over Rmp I-285 Ccbl to I-75S 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 June 2023.

How much traffic does I-285 over Rmp I-285 Ccbl to I-75S carry?

About 164,000 vehicles per day (2024 count), of which roughly 5% are trucks.

How long is I-285 over Rmp I-285 Ccbl to I-75S?

The structure is 212 ft (64.6 m) long with a longest span of 123 ft (37.5 m) and a deck 122 ft wide.

Who owns I-285 over Rmp I-285 Ccbl to I-75S?

It is owned by the State Highway Agency.