US Bridges

CR-320 over I-75

Fair

Marion County, Florida · CR-320 over I-75 · Structure no. 360034

Built
1964
61 years old
Condition
Fair
inspected May 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
303 ft
4 main spans
Daily traffic
500
2022 count
Owner
State
State Highway Agency

About this bridge

CR-320 over I-75 is a prestressed concrete stringer/multi-beam or girder carrying CR-320 over I-75 in Marion County, Florida. It was built in 1964, so it is 61 years old, older than the Florida average of 41.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 500 vehicles a day, roughly 7% of them trucks, projected to reach 868 by 2044. The structure is 303 ft (92.3 m) long and 34 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesCR-320
CrossesI-75
LocationCR-320 over I-75
RouteCounty Highway 320
CountyMarion County
StateFlorida
Coordinates29.44553, -82.26687
Functional classRural Minor Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating70.9 US tons
Inventory rating42.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadH 20
Structure length303 ft (92.3 m)
Longest span77 ft (23.4 m)
Deck width34 ft (10.4 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic500 (2022)
Projected traffic868 by 2044
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed6.2 mi (10 km)
TollOn a free road
National Highway SystemNo

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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was CR-320 over I-75 built?

It was built in 1964, making it 61 years old in 2025.

What condition is CR-320 over I-75 in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in May 2023.

How much traffic does CR-320 over I-75 carry?

About 500 vehicles per day (2022 count), of which roughly 7% are trucks.

How long is CR-320 over I-75?

The structure is 303 ft (92.3 m) long with a longest span of 77 ft (23.4 m) and a deck 34 ft wide.

Who owns CR-320 over I-75?

It is owned by the State Highway Agency.