Exit numbers along Florida’s Interstates correspond to the numbers on the mile markers along the highway.
The north-south interstates are numbered from south to north, with the lowest number starting in the south.
The east-west interstates are numbered from west to east, with the lowest number starting in the west.
For more information on how interstates and interstate exits are numbered, please refer to "Read Your Road: Every Highway User's Guide to Driving Safely" published by the Federal Highway Administration. This publication is available at http://safety.fhwa.dot.gov/ped_bike/docs/ryr.pdf
For additional information please contact Dana Knox at Dana.Knox@dot.state.fl.us.