US Bridges

I-85 Nbl Off Ramp over I-285 Rmp Cb to I-85 NB

Fair

DeKalb County, Georgia · 2.5 MI E of Chamblee · Structure no. 000000008902710

Built
1985
40 years old
Condition
Fair
inspected August 2024
Type
Box Beam or Girders - Single or Spread
Prestressed Concrete
Length
141 ft
1 main span
Daily traffic
11,200
2024 count
Owner
State
State Highway Agency

About this bridge

I-85 Nbl Off Ramp over I-285 Rmp Cb to I-85 NB is a prestressed concrete box beam or girders - single or spread carrying I-85 Nbl Off Ramp over I-285 Rmp Cb to I-85 NB in DeKalb County, Georgia. It was built in 1985, so it is 40 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 11,200 vehicles a day, roughly 1% of them trucks, projected to reach 15,795 by 2031. The structure is 141 ft (43 m) long and 33 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesI-85 Nbl Off Ramp
CrossesI-285 Rmp Cb to I-85 NB
Location2.5 MI E of Chamblee
RouteInterstate 85
CountyDeKalb County
StateGeorgia
Coordinates33.89256, -84.25682
Functional classUrban Local

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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2024
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 rating61 US tons
Inventory rating35.9 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length141 ft (43 m)
Longest span141 ft (43 m)
Deck width33 ft (10.1 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,200 (2024)
Projected traffic15,795 by 2031
Trucks1%
Lanes on structure1
Traffic directionOne-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$601,000
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-85 Nbl Off Ramp over I-285 Rmp Cb to I-85 NB built?

It was built in 1985, making it 40 years old in 2025.

What condition is I-85 Nbl Off Ramp over I-285 Rmp Cb to I-85 NB 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 August 2024.

How much traffic does I-85 Nbl Off Ramp over I-285 Rmp Cb to I-85 NB carry?

About 11,200 vehicles per day (2024 count), of which roughly 1% are trucks.

How long is I-85 Nbl Off Ramp over I-285 Rmp Cb to I-85 NB?

The structure is 141 ft (43 m) long with a longest span of 141 ft (43 m) and a deck 33 ft wide.

Who owns I-85 Nbl Off Ramp over I-285 Rmp Cb to I-85 NB?

It is owned by the State Highway Agency.