Port St. Lucie studies roadway network as Southwest annexation growth accelerates

At a July 7, 2025 City Council workshop, the Treasure Coast Regional Planning Council presented an early-stage transportation and land-use analysis of the Southwest annexation area and the wider roadway network serving Port St. Lucie.

The presentation, led by Kim Delaney of the regional council, said the study will assemble entitlement and traffic data, incorporate the mobility plan and city engineering standards, and run scenario tests with Kittelson & Associates to show how changing one roadway segment affects others. “We're at the beginning of that conversation,” Delaney told the council. She said the project team will test roughly eight scenarios and return to the council in the fall with findings and recommendations.

The briefing matters because large, previously approved Developments of Regional Impact (DRIs) and more recent entitlements together represent substantial future travel demand on the city's streets. Delaney summarized historical approvals from the 2003'006 period that the team used as a baseline: roughly 17,000 acres and about 44,000 residential units, plus millions of square feet of retail, office and industrial space. She said those totals have changed as market conditions and project plans evolved, and she identified updated 2025 inputs the team will use in modeling.

Key figures mentioned in the presentation and staff slides include (as presented): original DRI-era totals of about 17,000 acres and 44,000 residential units;…