The Quiet Heavy Vehicle (QVH90) project announced by the UK government in 1981 was aimed at supporting the UK commercial vehicle and engine manufacturers in meeting the proposed lower external noise levels required for vehicle type approval after 1989/90, as given in EC Directive 424/84/EEC. During the period when the QVH90 project was being set up, the Ford Motor Co Ltd (now IVECO Ford for truck manufacture) were engaged on a noise reduction exercise on a medium sized commercial vehicle. This work was being carried out for Ford by the Austrian firm of consultants AVL of Graz. Ford and the Transport and Road research Laboratory (TRRL) agreed that this work should form Ford's contribution to the project. This report is a summary of the reports provided by AVL at the conclusion of the project.

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