An online map of rest stops along Interstate 75 is located at restareas.appspot.com. This site actually offers a map of all rest stops in the continental United States. Zooming in along the route of Interstate 75 narrows the search.
The website I75ExitGuide.com provides a state-by-state list of the rest stops along this highway, from Florida to Michigan. The other states served by this highway include Georgia, Tennessee, Kentucky and Ohio. This site gives information on what services, such as vending machines and telephones, travelers can expect to find at each rest stop and whether or not a rest area is accessible for both north and southbound traffic or only traffic in one direction.