Kentucky supplemental roads and rural secondary highways are the lesser two of the four functional classes of highways constructed and maintained by the Kentucky Transportation Cabinet, the state-level agency that constructs and maintains highways in Kentucky. The agency splits its inventory of state highway mileage into four categories: The State Primary System includes Interstate Highways, Parkways, and other long-distance highways of statewide importance that connect the state's major cities, including much of the courses of Kentucky's U.S. Highways. The State Secondary System includes highways of regional importance that connect the state's smaller urban centers, including those county seats not served by the state primary system. The Rural Secondary System includes highways of local importance, such as farm-to-market roads and urban collectors. Supplemental Roads are the set of highways not in the first three systems, including frontage roads, bypassed portions of other state highways, and rural roads that only serve their immediate area.
The same-numbered highway can comprise sections of road under different categories. This list contains descriptions of Supplemental Roads and highways in the Rural Secondary System numbered 1000 to 1499 that do not have portions within the State Primary and State Secondary systems.
KY 1012
Kentucky Route 1012 is a rural secondary highway in Ashland in northern Boyd County. The highway begins at US 60 (13th Street) in the southwest corner of the city of Ashland. KY 1012 heads east along Boy Scout Road, which parallels Keys Creek for much of its course. The highway curves north away from Keys Creek and turns east onto South Belmont Street before reaching its eastern terminus in south central Ashland at KY 168, which heads north along South Belmont Street and south on Valley View Drive.
KY 1015
Kentucky Route 1015 is a rural secondary highway in northeastern Edmonson County and western Hart County. The highway begins at KY 728 (Nolin Dam Road) southeast of Straw. KY 1015 heads north along Union Light Road. Near the Edmonson–Hart county line, the highway veers east into the latter county. Ky 1015 continues on Dog Creek Road, which crosses the Dog Creek arm of Nolin River Lake and reaches its northern terminus at KY 88 (Cub Run Highway) east of the hamlet of Dog Creek. The Kentucky Transportation Cabinet established KY 1015 through a pair of official orders on March 11 and April 8, 1987.
KY 1038
Kentucky Route 1038 is a rural secondary highway in northern Logan County and southeastern Butler County. The highway begins at KY 79 (Morgantown Road) northeast of Russellville and heads east on Plainview Road, which passes to the north of Briggs Lake. At KY 1588 (Proctor Mill Road), KY 1038 veers north onto Bucksville Road. The highway intersects KY 103 (Chandlers Road) and passes through Gasper. KY 1038 meets the northern end of KY 73 (Cave Springs Road) just south of Rockhouse Creek. The highway passes through Richelieu at the Logan–Butler county line, where the route's name changes to Richelieu Road, before the route reaches its northern terminus at KY 1083 (Sugar Grove Road) south of Sharer.
KY 1040
Kentucky Route 1040 is a rural secondary highway in northern Logan County. The highway begins at KY 3519 (Lewisburg Road) at Danby. KY 1040 heads north along Cooperstown Road and passes through the eponymous village. North of Cooperstown, the route turns northwest onto Lost City Road while KY 3201 continues on Cooperstown Quality Road. KY 1040 crosses Laurel Creek, McAdoo Creek, and Austin Creek—all tributaries of the Mud River on its way to the city of Lewisburg. There, the highway follows Reservoir Road and crosses Alum Lick Creek before reaching its northern terminus at KY 106 (Quality Road) on the east side of town.
KY 1041
Kentucky Route 1041 is a rural secondary highway in southern Logan County. The highway begins at KY 96 (Orndorff Mill Road) at Dot. KY 1041 heads north along Watermelon Road, which meets the eastern end of KY 2375 (James Rose Road) and the western end of KY 739 (Johnson Young Road). The highway meets the eastern end of KY 775 (Olmstead Road) at Dripping Spring and the east end of KY 1151 (Dawson Road) east of Ferguson. KY 1041 intersects an R.J. Corman Railroad Group rail line at Cave Springs just south of the route's north end at US 79 (Clarksville Road).