(225 ILCS 440/3.05)
(from Ch. 121, par. 503.05)
"Main-traveled way" means the traveled way of a highway on which through
traffic is carried. In the case of a divided highway, the traveled way of
each of the separated roadways for traffic in opposite directions is a
main-traveled way. It does not include such facilities as frontage roads,
turning roadways, or parking areas.
(Source: P.A. 77-1815.)