US Bridges

I-285 Ramp to Mart over I-285 (sr 407)

Good

DeKalb County, Georgia · 5.5 MI E of Decatur · Structure no. 000000008903120

Built
1992
33 years old
Condition
Good
inspected June 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
335 ft
2 main spans
Daily traffic
420
2024 count
Owner
State
State Highway Agency

About this bridge

I-285 Ramp to Mart over I-285 (sr 407) is a steel continuous stringer/multi-beam or girder carrying I-285 Ramp to Mart over I-285 (sr 407) in DeKalb County, Georgia. It was built in 1992, so it is 33 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 420 vehicles a day, roughly 1% of them trucks, projected to reach 259,905 by 2031. The structure is 335 ft (102.1 m) long and 35 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

CarriesI-285 Ramp to Mart
CrossesI-285 (sr 407)
Location5.5 MI E of Decatur
RouteInterstate 285
StateGeorgia
Coordinates33.76945, -84.23278
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 inspectionJune 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 rating99 US tons
Inventory rating60 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
Structure length335 ft (102.1 m)
Longest span182 ft (55.5 m)
Deck width35 ft (10.7 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic420 (2024)
Projected traffic259,905 by 2031
Trucks1%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed98.8 mi (159 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$1.4 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-285 Ramp to Mart over I-285 (sr 407) built?

It was built in 1992, making it 33 years old in 2025.

What condition is I-285 Ramp to Mart over I-285 (sr 407) 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 June 2024.

How much traffic does I-285 Ramp to Mart over I-285 (sr 407) carry?

About 420 vehicles per day (2024 count), of which roughly 1% are trucks.

How long is I-285 Ramp to Mart over I-285 (sr 407)?

The structure is 335 ft (102.1 m) long with a longest span of 182 ft (55.5 m) and a deck 35 ft wide.

Who owns I-285 Ramp to Mart over I-285 (sr 407)?

It is owned by the State Highway Agency.