The northern segment follows an old alignment of Dixie Highway from CR 723 in Stuart to SR A1A in downtown Fort Pierce.
This segment is also known as Dixie Highway and Indian River Drive and runs parallel to the Florida East Coast Railroad tracks from Fort Pierce to Jensen Beach.
In the 1990s, the Florida Department of Transportation removed the State Road from several routes in the Stuart area, including SR 707A.
However, conflicting signage on Jensen Beach Boulevard indicates it is part of SR 732, CR 732, as well as County Road 707A.
Shopping centers are clustered near its interchange with Jensen Beach Boulevard while business and industrial parks straddle the county road near its southern terminus.