US Bridges

SR570 Polk EB 24.3 over I-4 SR 400

Good

Polk County, Florida · I-4 East Interchange · Structure no. 160282

Built
1999
26 years old
Condition
Good
inspected April 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
322 ft
3 main spans
Daily traffic
5,650
2022 count
Owner
Toll Authority
State Toll Authority

About this bridge

SR570 Polk EB 24.3 over I-4 SR 400 is a prestressed concrete stringer/multi-beam or girder carrying SR570 Polk EB 24.3 over I-4 SR 400 in Polk County, Florida. It was built in 1999, so it is 26 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 5,650 vehicles a day, roughly 15% of them trucks, projected to reach 9,803 by 2044. The structure is 322 ft (98 m) long and 43 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesSR570 Polk EB 24.3
CrossesI-4 SR 400
LocationI-4 East Interchange
RouteState Highway 570
StateFlorida
Coordinates28.15444, -81.84646
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
Deck8 Very GoodNo problems noted.
Superstructure7 GoodSome minor problems.
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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating83.1 US tons
Inventory rating49.9 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length322 ft (98 m)
Longest span138 ft (42.1 m)
Deck width43 ft (13.1 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,650 (2022)
Projected traffic9,803 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 SR570 Polk EB 24.3 over I-4 SR 400 built?

It was built in 1999, making it 26 years old in 2025.

What condition is SR570 Polk EB 24.3 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 April 2024.

How much traffic does SR570 Polk EB 24.3 over I-4 SR 400 carry?

About 5,650 vehicles per day (2022 count), of which roughly 15% are trucks.

How long is SR570 Polk EB 24.3 over I-4 SR 400?

The structure is 322 ft (98 m) long with a longest span of 138 ft (42.1 m) and a deck 43 ft wide.

Who owns SR570 Polk EB 24.3 over I-4 SR 400?

It is owned by the State Toll Authority.