The
State Primary Road System is an administrative system
used to track roads within the state that are maintained
by the Kentucky Transportation Cabinet. Roads, streets
and/or highways are classified by the type of service
and function the facility provides, as follows:
State
Primary Routes: Interstates (symbolized by black
lines on the maps), parkways (symbolized by brown lines
on the maps) and other long-distance, high-volume intrastate
routes (symbolized by red lines on the maps) that are
of statewide significance. These routes generally link
major urban areas with the state.
State
Secondary Routes: Shorter distance routes of
regional significance with both access to land use activity
and mobility as their functions. These routes generally
serve smaller cities and county seats within a region.
Symbolized by green lines on the maps.
Rural
Secondary Routes: Routes of subregional significance
with access to land use activity (such as farm-to-market
routes) as their prime function or urban arterial streets
or other collectors. Symbolized by yellow lines on the
maps.
Supplemental
Roads: Routes that are state-maintained for various
reasons but are not included in the higher classifications.
They are generally short-distance routes such as frontage
roads, cross roads or local access roads. Symbolized by
purple lines on the maps
