History
SR 15A used to include CR 15A, which continues the bypass to SR 11. It also used to include SR 472.
Former sections
Several former sections of SR 15A have existed throughout the state within the vicinity of SR 15. These include SR 139 (Kings Highway) heading northwest out of downtown Jacksonville as a hidden route for U.S. Route 23, SR 551 (Goldenrod Road) east of Orlando, and SR 729 (State Market Road) in Pahokee.
One notable section was from US 17 Roosevelt Boulevard on US 17 Alt Roosevelt Expressway until ending on eastbound Interstate 10 (SR 8). With the realignment of US 17 onto the Roosevelt Expressway, that segment became part of SR 15.
Other sections of SR 15A have existed:
- SR 15A, now CR 15A, connected SR 15/SR 700 (US 98/US 441) at Upthegrove Beach to SR 710. At the same time, SR 15B (now CR 15B) connected the same two highways near the Okeechobee-Martin County boundary line about to the southeast.
- SR 15A, now CR 15A, connected SR 15 (US 17) south of Green Cove Springs to SR 16 west of Green Cove Springs.
- Several short sections of SR 15A spurred from SR 15 (US 17) in and near Orange Park. Some or all may now be CR 15A.
Historic State Road 15C
In addition to the former SR 15B noted above, Okeechobee County also had a State Road 15C. Now CR 15C, it was, and still is, an eastward spur from SR 15 near Fort Drum.