Fla. Stat. § 348.03101

The department may be appointed by the agency as its agent for the purpose of constructing improvements and extensions to an expressway system and for the completion thereof. In such event, the agency shall provide the department with complete copies of all documents, agreements, resolutions, contracts, and instruments relating thereto; shall request the department to do such construction work, including the planning, surveying, and actual construction of the completion of and extensions and improvements to the expressway system; and shall transfer to the credit of an account of the department in the State Treasury the necessary funds therefor. The department shall thereupon proceed with such construction and use the funds for such purpose in the same manner as it is now authorized to use the funds otherwise provided by law for its use in the construction of roads and bridges.