Former segments

Seven Springs:

• Old County Road 54(Fifth Avenue), Little Road(CR 1), Gunn Highway

Odessa:

• Abandoned State Road 54 R.O.W.: Gunn Highway from CR 996 to Old Gunn Highway.
• Black Lake Road

Land o' Lakes:

• Catfish Lake Lane

Cypress Creek:

• Cabbage Swamp Road
• Memorial Drive

Wesley Chapel:

• County Road 54 (Western segment), left as a gap in the state road when State Road 56 was constructed.

Zephyrhills:

• State Road 54 continued from its present terminus at US 301 along a concurrency with 301 to the present-day eastern segment of County Road 54, where it followed present CR 54 eastward to US 98 and the Pasco-Polk County line(see below).

County Road 54 (Zephyrhills-Branchborough)

Besides the gap between SR 56 and SR 581 in Wesley Chapel, County Road 54 is a county extension of SR 54 south of Dade City. It begins at County Road 579 (Morris Bridge Road) west of downtown Zephyrhills and runs north in a short overlap with that road until it curves east, and runs east along Eiland Boulevard, while CR 579 continues north along Handcart Road. This intersection is also the site of the eastern terminus of the proposed West Zephyrhills Bypass. Turning briefly to the southeast it then moves straight east and west along a former segment of North Avenue, only to turn northeast again at the intersection with the existing North Avenue, then turns straight before encountering County Road 41, and then an intersection with U.S. Route 301, where it catches hidden SR 54.

East of US 301 the road runs towards the northeastern outskirts of Zephyrhills. Before this it encounters an intersection with 12th Street and Wire Road, which is where a former segment of SR 54 used to turn north from 12th Street then east to the present CR 54 until that route was relocated to the hidden route along US 301. Once CR 54 leaves the city north of Zephyrhills Municipal Airport it has an intersection with the western terminus of County Road 54 Alternate (see below) on the northwest corner of an at-grade crossing with the CSX Yeoman Subdivision, and east of that crossing encounters a major county road known as CR 535 (Zephyrhills Bypass). From there, the road takes a slight turn to the northeast as it crosses another CSX railroad line known as the Vitis Subdivision, and then runs along the northern border of the Upper Hillsborough Wildlife Management Area. Shifting back straight east and west again, it approaches the southern terminus of Alternate CR 35 in Lumberton, although ALT CR 35 may have overlapped CR 54 east of here at one time. Beyond this point it passes through the aforementioned wildlife management area where it approaches a narrow bridge over the Hillsborough River, thus running along the Pasco-Polk County line, both side of which consist of private property once again until it finally reaches US 98 in Branchborough.

State Road 54A

State Road 54A, known locally as Black Lake Road, is a road located in Odessa, Florida totaling 1.097 miles (1.765 km). Portions of the road were once part of State Road 54 until it was realigned to bypass the suburbs it runs along. Despite the realignment, Black Lake Road is still maintained by FDOT. It consists of two separate roads, both named Black Lake Road, as well as a cul de sac, originally connecting to the current SR 54.

County Road 54 Alternate

County Road 54 Alternate is a bannered alternate of CR 54 east of the Zephyrhills City Limits. It begins on the west side of the CR 54 at-grade crossing of the CSX Yeoman Subdivision, as Forbes Road and almost immediately turns straight north From there it curves east onto Lynbrook Drive and crosses the very same railroad line with an at-grade crossing of its own. The only other road that passes for a major intersection at this point is CR 535 (Zephyrhills Bypass).

Before Lynbrook Road becomes a dead end street in Lumberton, ALT CR 54 makes another north turn onto Elwood Road. It briefly turns northeast onto Merrick Road where it crosses another CSX railroad line known as the Vitis Subdivision, and after passing two dirt roads such as Lena Circle and Bayleaf Street finally turns straight east and west once again. ALT CR 54 remains at this trajectory until it officially ends at Alternate County Road 35, although as with its parent route, ALT CR 54 may have overlapped ALT CR 35 going south back to CR 54 at one time.