US Bridges

I-75 Sbl over I-16 Ramp/ NS R/R

Good

Bibb County, Georgia · In North Central Macon · Structure no. 000000002150850

Built
2020
5 years old
Condition
Good
inspected April 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
497 ft
4 main spans
Daily traffic
41,400
2024 count
Owner
State
State Highway Agency

About this bridge

I-75 Sbl over I-16 Ramp/ NS R/R is a prestressed concrete stringer/multi-beam or girder carrying I-75 Sbl over I-16 Ramp/ NS R/R in Bibb County, Georgia. It was built in 2020, so it is 5 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 41,400 vehicles a day, roughly 7% of them trucks, projected to reach 4,600 by 2036. The structure is 497 ft (151.5 m) long and 31 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesI-75 Sbl
CrossesI-16 Ramp/ NS R/R
LocationIn North Central Macon
RouteInterstate 75
CountyBibb County
StateGeorgia
Coordinates32.85746, -83.6415
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 geometry3: Basically intolerable, requiring high priority of corrective action
Approach roadway alignment8: Equal to present desirable criteria
Operating rating89 US tons
Inventory rating35.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20 + Mod
Structure length497 ft (151.5 m)
Longest span173 ft (52.7 m)
Deck width31 ft (9.5 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic41,400 (2024)
Projected traffic4,600 by 2036
Trucks7%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway and railroad
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$66.2 million (2020 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-75 Sbl over I-16 Ramp/ NS R/R built?

It was built in 2020, making it 5 years old in 2025.

What condition is I-75 Sbl over I-16 Ramp/ NS R/R 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-75 Sbl over I-16 Ramp/ NS R/R carry?

About 41,400 vehicles per day (2024 count), of which roughly 7% are trucks.

How long is I-75 Sbl over I-16 Ramp/ NS R/R?

The structure is 497 ft (151.5 m) long with a longest span of 173 ft (52.7 m) and a deck 31 ft wide.

Who owns I-75 Sbl over I-16 Ramp/ NS R/R?

It is owned by the State Highway Agency.