92 Ill. Adm. Code 547.200
Definitions
Section 547.200 Definitions
The following words or phrases, when used in this Part,
shall have the meanings ascribed to them in this Section.
"Department"
– the Illinois Department of Transportation, with central offices at 2300
South Dirksen Parkway, Springfield, Illinois 62764.
"Engine Braking Sign" or
"the sign" – a rectangular sign displaying the words EXCESSIVE ENGINE
BRAKING NOISE PROHIBITED. (See Section 12-602.1(b) of the Code.)
"Freeway"
– a divided highway for through traffic with full control of access and grade
separations at crossroads. When used in this Part, freeways shall include the
connecting ramps between freeways and other roads and streets.
"Interstate" – a freeway
that is part of the National System of Interstate and Defense Highways and
marked with an Interstate Route Number.