US Bridges

I-285 over I-20 Ramp

Good

DeKalb County, Georgia · 5.8 MI SE of Decatur · Structure no. 000000008902580

Built
1983
42 years old
Condition
Good
inspected April 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
84 ft
1 main span
Daily traffic
144,000
2024 count
Owner
State
State Highway Agency

About this bridge

I-285 over I-20 Ramp is a prestressed concrete stringer/multi-beam or girder carrying I-285 over I-20 Ramp in DeKalb County, Georgia. It was built in 1983, so it is 42 years old, younger 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 144,000 vehicles a day, roughly 1% of them trucks, projected to reach 226,185 by 2031. The structure is 84 ft (25.6 m) long and 122 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesI-285
CrossesI-20 Ramp
Location5.8 MI SE of Decatur
RouteInterstate 285
StateGeorgia
Coordinates33.71356, -84.24225
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.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating75.9 US tons
Inventory rating38.9 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length84 ft (25.6 m)
Longest span84 ft (25.6 m)
Deck width122 ft (37.1 m)
Roadway width112 ft (34.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic144,000 (2024)
Projected traffic226,185 by 2031
Trucks1%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed3.1 mi (5 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$1 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-285 over I-20 Ramp built?

It was built in 1983, making it 42 years old in 2025.

What condition is I-285 over I-20 Ramp 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 April 2024.

How much traffic does I-285 over I-20 Ramp carry?

About 144,000 vehicles per day (2024 count), of which roughly 1% are trucks.

How long is I-285 over I-20 Ramp?

The structure is 84 ft (25.6 m) long with a longest span of 84 ft (25.6 m) and a deck 122 ft wide.

Who owns I-285 over I-20 Ramp?

It is owned by the State Highway Agency.