Traffic Engineering and Operations Office
On January 28, 2002 the Florida Department of Transportation (FDOT) began changing exit numbers along Florida's Interstates, beginning at Interstate 10. This project is now complete.
The exit numbers were changed from consecutive exit numbers to milepost numbers. Now, the new exit numbers match the numbers on the mile markers along the highway. The advance guide signs and the exit direction signs will display both the old and new exit numbers for about two years so that everyone can get used to the new numbers.
new numbering system makes it easier for you to travel throughout Florida.
The milepost exit numbers are more convenient and safer. It provides a system where you, the motorist, can easily determine your position along the highway. That's good news if you're trying to tell people where you are in an emergency situation. It also helps you determine the remaining distance to your destination since the new exit numbers match the mile markers along the highway.
The milepost exit numbers allow for consistent numbering of new interchanges. New exits are given a number based on their location, instead of fitting a new number into an existing number sequence.
The milepost exit numbers are what most other states around the country use. If you're traveling from state to state, Florida's new milepost exit numbering system will make sense! According to the American Association of State Highway and Transportation Officials (AASHTO), there are a few who use the consecutive numbering system. Recently, Georgia, converted their consecutive exit numbers to a milepost numbering system (The Georgia DOT link above will open another window of your browser).
Whether exits are numbered consecutively or according to the closest milepost, north-south interstates are always numbered from south to north. For example, I-95 begins with Exit 1A (old exit number 1) in Miami. The last exit before the Georgia line is Exit 380 (old exit number 130).
Similarly, east-west interstates like I-10 are numbered from west to east, with the lowest numbers 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 Chris Lewis at Christopher.Lewis@dot.state.fl.us