(225 ILCS 440/3.05) (from Ch. 121, par. 503.05)
    Sec. 3.05. "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.)