US Bridges

SR 570 Polk WB 0.0 over I-4 SR 400

Good

Polk County, Florida · I-4 West Interchange · Structure no. 160235

Built
1998
27 years old
Condition
Good
inspected May 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
316 ft
3 main spans
Daily traffic
16,700
2022 count
Owner
Toll Authority
State Toll Authority

About this bridge

SR 570 Polk WB 0.0 over I-4 SR 400 is a prestressed concrete stringer/multi-beam or girder carrying SR 570 Polk WB 0.0 over I-4 SR 400 in Polk County, Florida. It was built in 1998, so it is 27 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 16,700 vehicles a day, roughly 15% of them trucks, projected to reach 28,974 by 2044. The structure is 316 ft (96.4 m) long and 43 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesSR 570 Polk WB 0.0
CrossesI-4 SR 400
LocationI-4 West Interchange
RouteState Highway 570
CountyPolk County
StateFlorida
Coordinates28.03669, -82.03998
Functional classUrban Principal Arterial - Other Freeway or Expressway

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 inspectionMay 2024
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 alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating46.6 US tons
Inventory rating37.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length316 ft (96.4 m)
Longest span138 ft (42.2 m)
Deck width43 ft (13.2 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic16,700 (2022)
Projected traffic28,974 by 2044
Trucks15%
Lanes on structure1
Traffic directionOne-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a toll road
National Highway SystemYes

Ownership and planned work

OwnerState Toll Authority
Maintained byState Toll Authority
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 570 Polk WB 0.0 over I-4 SR 400 built?

It was built in 1998, making it 27 years old in 2025.

What condition is SR 570 Polk WB 0.0 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 May 2024.

How much traffic does SR 570 Polk WB 0.0 over I-4 SR 400 carry?

About 16,700 vehicles per day (2022 count), of which roughly 15% are trucks.

How long is SR 570 Polk WB 0.0 over I-4 SR 400?

The structure is 316 ft (96.4 m) long with a longest span of 138 ft (42.2 m) and a deck 43 ft wide.

Who owns SR 570 Polk WB 0.0 over I-4 SR 400?

It is owned by the State Toll Authority.