Noise Control Act Enforcement Rules Article 6
The expressways in Article 14 of this Act shall refer to expressways specified in the Freeway and Expressway Traffic Control Regulations, and expressways specified in the Design Directions for Urban Roads and Accessory Works.Other noise produced by traffic in Article 15 of this Act shall refer to the following types of traffic noise:I.Other provincial or county roads designated in the Highway Act apart from the expressways in the foregoing paragraph.II.Main and secondary roads designated in the Design Directions for Urban Roads and Accessory Works.III.Other traffic systems or roads designated by the central competent authority.