Kentucky Route 3500 (KY 3500) is a 4.085-mile-long (6.574 km) rural secondary highway in southern Allen County.

[1][2] After US 31E's bypass of Scottsville was completed in 1989, the Kentucky Transportation Cabinet established KY 3500 as a supplemental road along old US 31E through a February 17, 1989, official order.

[1][4] The Kentucky Transportation Cabinet established KY 3520 through a September 6, 2002, official order that also moved US 60 to its new course to the north.

The highway intersects a Paducah & Louisville Railway line, crosses Black Branch of Massac Creek, and runs concurrently with KY 1565 past McCracken County High School.

[1][4] Kentucky Route 3521 (KY 3521) is a 1.255-mile-long (2.020 km) rural secondary highway in southern Allen County.

[1][2] The Kentucky Transportation Cabinet added the highway to the rural secondary system through an October 13, 2005, official order.

[3] Kentucky Route 3522 (KY 3522) is a 0.551-mile-long (0.887 km) supplemental road in northern Henderson that begins at a junction with US 41.

The highway crosses Cedar Creek, a tributary of the Kentucky River, and passes through the Monterey Historic District and to the east of Byrns Landing.

[1][12] The Kentucky Transportation Cabinet assigned KY 3545 as a supplemental road in a July 7, 2011, official order.

[1][14] The Kentucky Transportation Cabinet assigned KY 3545 as a supplemental road in a June 14, 2016, official order.

[15] Kentucky Route 3545 (KY 3545) is a 0.675-mile-long (1.086 km) rural secondary highway in northern Rockcastle County.

[1][16] The Kentucky Transportation Cabinet added the highway to the rural secondary system through an October 21, 2016, official order.

[17] Kentucky Route 3548 (KY 3548) is a 3.530-mile-long (5.681 km) rural secondary highway in western Owen County.

[1][9] The Kentucky Transportation Cabinet added KY 3548 to the rural secondary system through a March 19, 2012, official order.

[10] Kentucky Route 3549 (KY 3549) is a 5.067-mile-long (8.155 km) rural secondary highway in central Owen County.

[1][9] The Kentucky Transportation Cabinet added the highway to the rural secondary system through a March 19, 2012, official order.

Kentucky Route 6087 (KY 6087) is a 0.130-mile-long (0.209 km) supplemental state highway that begins at Masonville-Habit Road.

Kentucky Route 6116 (KY 6116) is a 0.161-mile-long (0.259 km) supplemental road near the town of Cromwell in Ohio County.

The highway runs from the beginning of state maintenance east along Clay Leach Lane to a route transition with KY 2712.

[1][28] Kentucky Route 6147 (KY 6147) is a 0.038-mile-long (0.061 km) unsigned supplemental road in the city of Louisville in Jefferson County.

[1][28] Kentucky Route 6148 (KY 6148) is a 0.028-mile-long (0.045 km) unsigned supplemental road in the city of Louisville in Jefferson County.

The highway runs from KY 2052 east and north along Old Shepherdsville Road to the end of state maintenance.

The highway runs from KY 61 east along Preston Parkway then north to the Jefferson County line where it continues as Holgate Drive.

[1][28] Kentucky Route 6305 (KY 6305) is a 0.083-mile-long (0.134 km) one-way southbound supplemental road in the city of Louisville in Jefferson County.

Kentucky Route 6314 (KY 6314) is a 0.161-mile-long (0.259 km) supplemental road by the city of Pioneer Village in Bullitt County.

The highway runs from KY 480 eastward to the end of state maintenance where it continues as Sparrow Drive.

The highway runs from the beginning of state maintenance northward to Smyrna Parkway, just north of I-265 exit 14.

The highway runs from Rocky Lane eastward, parallel to the I-265 northbound on-ramp, to the end of state maintenance.

The highway runs from Johnson School Road northward along Smith Lane to the end of state maintenance.

[1][28] Kentucky Route 6328 (KY 6328), also known as Kendrick Lane, is a 0.220-mile-long (0.354 km) supplemental road in the city of Louisville in Jefferson County.