This document specifies the performance requirements and methods of evaluation for road traffic noise reducing devices. This document covers acoustic, non-acoustic and long term performance, but not aspects such as resistance to vandalism or requirements of visual appearance. This document covers products used for road traffic noise reduction made from any materials. This document does not cover road surfaces or the airborne sound insulation of houses. This document does not cover material specific characteristics necessary to meet the performance requirements of the standard. If existing, material specific standards shall also apply in accordance with the specifications prescribed hereafter.