Background: the lower southeast Florida region, comprised of Monroe, Dade, Broward and Palm Beach Counties, has been identified by the National Oceanic and Atmospheric Administration as one of the most hurricane vulnerable areas of the United States. The U.S. Army Corps of Engineers, Jacksonville District, recognizing the need to identify and measure time components critical to the hurricane evacuation process, provided funding through its Flood Plain Management Services Program and leadership to accomplish this study. Funding assistance was also provided by the Federal Emergency Management Agency (FEMA). Detailed technical study results are provided through this Technical Data Report. Implementation Reports will be developed subsequently by county civil defense officials with the assistance of the Jacksonville District, Corps of Engineers to provide a decision making guide for local county officials. Public information materials will then be developed by the South Florida and Treasure Coast Regional Planning Councils. Major technical work tasks were performed by Post, Buckley, Schuh & Jernigan, Inc. under contract to and under the guidance of, the Jacksonville District, Corps of Engineers.