State of the art of Noise barriers in CEDR experience

In the framework of CEDR Noise group's Strategic Plan 2013-2017, the report "Noise barriers : State of art" presents a general overview of the domain of noise barriers used along European roads. The report intends to assist each NRA (Noise Road Administration) in the planning, building and maintaining processes of noise barriers for new and existing road infrastructureThe first part of the document is dedicated to the different acoustic and non-acoustic standards and guidelines used to insure the performances of the devices. The second part focuses on the types of barriers looking at the aesthetic appeal, shapes and materials with a reference to the experience and the bad examples collected from the CEDR member states. The last chapter offers a comprehensive review of recent research projects on NRD's in the various CEDR member states: combined noise and safety barriers, photovoltaic noise barriers, noise barriers with TiO2 coating,...This publication aims to provide a framework of the working principles of a noise barrier focusing on minimum requirements for the device to ensure its best life time.