US Bridges

SR-559 over I-4 (SR-400)

Good

Polk County, Florida · 2.4 MI South of SR-33 · Structure no. 160348

Built
2016
9 years old
Condition
Good
inspected January 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
378 ft
3 main spans
Daily traffic
22,000
2024 count
Owner
State
State Highway Agency

About this bridge

SR-559 over I-4 (SR-400) is a prestressed concrete stringer/multi-beam or girder carrying SR-559 over I-4 (SR-400) in Polk County, Florida. It was built in 2016, so it is 9 years old, younger than the Florida average of 41.3 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 22,000 vehicles a day, roughly 20% of them trucks, projected to reach 38,170 by 2044. The structure is 378 ft (115.1 m) long and 110 ft wide. If it were closed, the detour would be 4.3 mi (7 km).

Location

Open in Google Maps
CarriesSR-559
CrossesI-4 (SR-400)
Location2.4 MI South of SR-33
RouteState Highway 559
CountyPolk County
StateFlorida
Coordinates28.15756, -81.80195
Functional classUrban Minor Arterial

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.
Substructure8 Very GoodNo problems noted.
Last inspectionJanuary 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 rating41.4 US tons
Inventory rating36 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length378 ft (115.1 m)
Longest span155 ft (47.3 m)
Deck width110 ft (33.4 m)
Roadway width88 ft (26.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic22,000 (2024)
Projected traffic38,170 by 2044
Trucks20%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed4.3 mi (7 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 SR-559 over I-4 (SR-400) built?

It was built in 2016, making it 9 years old in 2025.

What condition is SR-559 over I-4 (SR-400) 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 January 2024.

How much traffic does SR-559 over I-4 (SR-400) carry?

About 22,000 vehicles per day (2024 count), of which roughly 20% are trucks.

How long is SR-559 over I-4 (SR-400)?

The structure is 378 ft (115.1 m) long with a longest span of 155 ft (47.3 m) and a deck 110 ft wide.

Who owns SR-559 over I-4 (SR-400)?

It is owned by the State Highway Agency.