92 Ill. Adm. Code 562.20
Definitions
Section 562
Section 562.20 Definitions
The following definitions have
been adopted by the Department of Transportation for the purpose of
administering the provisions of the Freeway Act.
"Freeway." A freeway is defined as a public
highway especially designed for through traffic and to or from which owners of
or persons having an interest in abutting property, or other persons, have no
right of direct access or only limited right of direct access by reason of the
fact that the said property abuts upon such highway, or for any other reason.
On freeways to be constructed with complete control of access the physical
means of access shall be limited to ramps, approaches or other facilities
located, designed and constructed by the Department for entrance to and exit
from the freeway by the general public.
"Local Service Drives." Local service drives,
commonly called frontage roads, are roads located generally parallel and
adjacent to the freeway traffic lanes. Their purpose is to provide means of
indirect access to and from the freeway by the owners of, or persons having
interests in the properties abutting the freeway, or any other persons. These
local service drives or frontage roads may be either roads constructed by the
Department on the freeway right of way or existing roads or streets adjacent to
the freeway which shall be or have been designated as such local service drives
or frontage roads by the Department.