Work on a 12-foot-wide recreational trail that someday will stretch between Hillsborough and Pinellas counties starts Sunday as part of a Courtney Campbell Parkway project.
This phase of the project is estimated at $8.4 million.
It will repave State Road 60, and an access road on the north side of the highway, between Rocky Point Drive in Tampa and the Pinellas County line.
And, on the Hillsborough side of the causeway's hump, work starts on a trail on the south side of the highway. This segment extends from Bay Harbor Drive to the west end of Ben T. Davis Beach.
Additional work on the project includes a sidewalk, guardrails and some new traffic lights.
The Florida Department of Transportation warns drivers that some uneven lanes and, later, nighttime lane closures will accompany the project.
This phase is expected to be complete by August 2013.