Plan Hillsborough (Hillsborough County City-County Planning Commission) | 832 followers on LinkedIn. The Planning Commission, the official local planning agency for all jurisdictions in Hillsborough County, provides consolidated planning services and makes independent recommendations to the Board of County Commissioners, Plant City Commission, Tampa City Council, Temple Terrace City Council and other agencies regarding smart growth and development of Hillsborough County. The Hillsborough Transportation Planning Organization (TPO) is a transportation policy-making board mandated by federal and state law. The Hillsborough TPO is directly responsible for making sure federal and state dollars spent on existing and future transportation projects and programs are based on a continuing, cooperative and comprehensive transportation planning process.