Seminole County, Florida (located in Central Florida) operates a system of county roads that serve all portions of the county. The Seminole County Public Works Department, Engineering Division, is responsible for maintaining all of the Seminole County roads. Most of the county roads are city streets and rural roads.
The numbers and routes of state roads are assigned by the Florida Department of Transportation (FDOT), while county road numbers are assigned by the counties, with guidance from FDOT. North-south routes are generally assigned odd numbers, while east-west routes are generally assigned even numbers. The majority of county road numbers reflect their former status as state roads before they were given to the county in 1980.
Former SR 13
In the early 1950s, FDOT acquired part of the Kissimmee Valley Line of the Florida East Coast Railway in Orange and Seminole Counties for highway purposes. The proposed state road was numbered as an extension of the existing State Road 13.
Maps of Seminole County indicate that Snow Hill Road, to the east of the former rail line (including the portion through the Little Big Econ State Forest), was designated SR 13 from Brumley Road in Chuluota north to Old Mims Road (original SR 46) near Geneva. It is labeled on maps through 1960, but does not appear in 1971.
CR 15 (former SR 15)
County Road 15 follows Country Club Road, Upsala Road, and Monroe Road from CR 427 north of Longwood north to US 17/92 (SR 15) near the St. Johns River and I-4 exit 104. It passes through central Lake Mary and overlaps CR 46A in western Sanford.
The 1945 definition of SR 15 included an alternate route bypassing Sanford to the west, from north of Longwood to just south of the St. Johns River. During early Interstate Highway System planning, this was to be the route of what became I-4. However, no road was ever built south of CR 427, and maps indicate that a portion in northern Lake Mary was not state maintained. This spur of SR 15 became CR 15 in 1980.
CR 46A (former SR 46A)
County Road 46A begins at the south end of CR 431 (Orange Boulevard) near Paola and runs east on H.E. Thomas Jr. Parkway (formerly 25th Street) to US 17/92 and SR 46 in Sanford. Along the way it crosses I-4 at exit 101A and SR 417 at exit 52.
SR 46A was not part of the original 1945 plans, but it was added to the state highway system by the 1950s. It originally began at Paola, north of the west end of CR 46A, and, in Sanford, it followed Country Club Road and 20th Street to end north of CR 46A's east end. The more direct route along 25th Street was present by 1971. Maps do not indicate that SR 46A returned to SR 46 at its west end, but maps after 1980, when it became CR 46A, incorrectly show that route continuing west along Markham Road then north on Longwood Markham Road to SR 46 near the Wekiva River. Road signage properly shows west 46A ends at the intersection of H. E. Thomas Parkway and Orange Blvd.
CR 415 (former SR 415)
County Road 415 is signed north-south, but travels directly east-west on 13th Street and Celery Avenue from US 17/92 / SR 46 in Sanford east (signed north) to SR 415 near the St. Johns River.
CR 415 is part of the original SR 415 alignment defined in 1945, hence the north-south signage. When the current SR 415 was built from the St. Johns River south to SR 46 in the late 1970s, it was initially numbered State Road 415A. This route remained in 1980, but by 1984 it had become part of SR 415, and former SR 415 west into Sanford had been given to the county.
Former SR 418
State Road 418 from the 1945 plan connected SR 46 (then on Old Geneva Road) north of Geneva with the community of Osceola on the St. Johns River. If it was actually taken over as a state road, it had a brief lifetime, as there is no SR 418 on the 1955 county map.
CR 419 (former SR 419)
County Road 419 is a part of the original SR 419 from 1945, beginning at the Orange County line and extending north and northwest through Chuluota to Oviedo. SR 419 now begins in Oviedo and continues in a northwesterly direction to US 17/92 near Lake Mary.
CR 425 (former SR 425)
County Road 425 follows Sanford Avenue from the north end of CR 427 (Ronald Reagan Boulevard), just north of Lake Mary Boulevard, north to SR 46 in Sanford. The current FDOT county map shows two more sections, but Seminole County does not post signs on either. One is on Dean Road from SR 426 south to Orange County, where it is also known as CR 425. The other follows Airport Boulevard between US 17/92 and SR 46, providing a western bypass of central Sanford.
