"Arterial street" means a street designated as an arterial street in the general plan which, because of its design and location with respect to other streets and other sources of traffic, is used or designed to carry relatively heavy volumes of traffic through an urban area or between urban areas, which serves as approach to a highway or freeway. (Ord. 617 §2 (Exh. A), 2011; Ord. 474, 2002).