8.—(1) No part of the authorised development is to commence until a plan showing the locations of the acoustic barriers and details of the length, height, design and materials of the acoustic barriers has been submitted to and approved in writing by, the relevant planning authority.
(2) The acoustic barriers must be erected in accordance with the approved details prior to the opening of the link road and must be retained in place throughout the life of the road.
(3) All construction work must be undertaken in accordance with guidance detailed in the BS5228:2009 code of practice for noise and vibration control on construction and open sites, parts 1 and 2.
(4) All plant, equipment and other machinery used in connection with the construction of the link road must be equipped with effective silencing equipment or sound proofing equipment to the standard of design set out in the manufacturer’s specification and must be maintained in accordance with that specification at all times throughout the development.