Selmon Expressway Interchange

Interchange of FL-618 Toll & I-4 in Tampa, Florida

Five-level stack interchange in Tampa, Florida

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Selmon Expressway Interchange

Bottom level: FL-618 Toll general purpose lanes eastbound

Photo taken by Brianna Tarness

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Description 

The Selmon Expressway Interchange is an unusually designed five-level stack interchange that connects FL-618 Toll (Lee Roy Selmon Expressway) with Interstate 4 in Tampa, Florida.

The interchange opened in 2014, along with a tolled elevated causeway bridge that connects the two highways. The causeway bridge is of extremely similar design to that of the elevated express lanes along FL-618 Toll.

The elevated express lanes are part of the reason for the unusual design of the interchange. A traditional five-level stack has five flyover ramps directly stacked on top of each other. The Selmon Expressway Interchange has five levels of flyover ramps, but they are not all directly stacked - rather some of them are off to the side of the others, etc. The interchange contains ramps between the general purpose lanes of FL-618 Toll, the express lanes of FL-618 Toll, the elevated causeway bridge, and the ramps between I-4 in both directions and the causeway bridge.

An all-electronic SunPass or “Pay-by-Plate” toll gantry is located on the elevated causeway bridge, about 1,500 feet from the interchange.

Update Log 

  • June 12, 2018: Added by Brianna Tarness

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