Structure 6753210 · Cobb County, GA

I-75 Managed Lanes over I-75 Sbl - I-75 Ramp - B

Carries I-75 Managed Lanes over I-75 Sbl - I-75 Ramp - B, Near Kennesaw.

Overall conditionGood

Set by its lowest-rated component: Deck and Superstructure and Substructure at 7 of 9.

How ratings work
Decksets the rating7/9 · Good
Superstructuresets the rating7/9 · Good
Substructuresets the rating7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT1,486 FT OVERALL250 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 7/9

1,486 ft end to end, longest span 182 ft: about 4.1 football fields. Lengths and the semi-truck on the deck are drawn to the same scale. Each part is colored by its latest inspection rating. The inventory records lengths but not heights or the layout of the shorter spans, so those are drawn as typical for a multi-beam bridge.

Built201610 years old
Length1485.9 ft452.9 m
Daily traffic9,999counted 2024
Last inspectedFebruary 2024every 24 months

Location

StateGeorgia
CountyCobb
LocationNear Kennesaw
CarriesI-75 Managed Lanes
CrossesI-75 Sbl - I-75 Ramp - B
Coordinates34.00945, -84.56748

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length1485.9 ft (452.9 m)
Max Span182.1 ft (55.5 m)
Deck Width29.2 ft (8.9 m)
Deck Area4030.8 sq m
Main Spans11
Year Built2016

Traffic

Avg Daily Traffic9,999 (2024)
Lanes On Bridge1
Lanes Under Bridge14

Inspection & Ownership

Last InspectionFebruary 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number000000006753210

How Bridge Ratings Work

Inspectors rate each major part of a bridge (the deck you drive on, the superstructure of beams that holds it up, and the substructure of piers and abutments beneath) on a 0–9 scale. A bridge's overall condition is its lowest of those ratings, so one deteriorated component makes the whole bridge "poor."

0Failed
1Imminent failure
2Critical
3Serious
4Poor
5Fair
6Satisfactory
7Good
8Very good
9Excellent
Good · lowest component 7–9
Fair · lowest component 5–6
Poor · lowest component 0–4

A poor rating is not a closure. It means the bridge is flagged for priority repair or replacement; bridges judged unsafe are closed or posted with weight limits. The waterway (channel) rating is reported, but it does not count toward the overall classification.

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