US Bridges

Interstate 285 over GA400RAMP/PTREE Dnwdy RD

Good

Fulton County, Georgia · In S. Sandy Springs · Structure no. 000000012154040

Built
2021
4 years old
Condition
Good
inspected June 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
1,189 ft
11 main spans
Daily traffic
9,710
2024 count
Owner
State
State Highway Agency

About this bridge

Interstate 285 over GA400RAMP/PTREE Dnwdy RD is a prestressed concrete stringer/multi-beam or girder carrying Interstate 285 over GA400RAMP/PTREE Dnwdy RD in Fulton County, Georgia. It was built in 2021, so it is 4 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 9,710 vehicles a day, roughly 9% of them trucks, projected to reach 18,610 by 2039. The structure is 1,189 ft (362.4 m) long and 33 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesInterstate 285
CrossesGA400RAMP/PTREE Dnwdy RD
LocationIn S. Sandy Springs
RouteInterstate 285
StateGeorgia
Coordinates33.9123, -84.3541
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 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating85 US tons
Inventory rating43 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans11
Design loadHL 93
Structure length1,189 ft (362.4 m)
Longest span117 ft (35.8 m)
Deck width33 ft (10.1 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,710 (2024)
Projected traffic18,610 by 2039
Trucks9%
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$158.4 million (2021 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was Interstate 285 over GA400RAMP/PTREE Dnwdy RD built?

It was built in 2021, making it 4 years old in 2025.

What condition is Interstate 285 over GA400RAMP/PTREE Dnwdy RD 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 2023.

How much traffic does Interstate 285 over GA400RAMP/PTREE Dnwdy RD carry?

About 9,710 vehicles per day (2024 count), of which roughly 9% are trucks.

How long is Interstate 285 over GA400RAMP/PTREE Dnwdy RD?

The structure is 1,189 ft (362.4 m) long with a longest span of 117 ft (35.8 m) and a deck 33 ft wide.

Who owns Interstate 285 over GA400RAMP/PTREE Dnwdy RD?

It is owned by the State Highway Agency.