The idea of designing and building quieter pavements is not new, but in recent years there has been a groundswell of interest in making this a higher priority. Various State Highway Agencies and the Federal Highway Administration have responded accordingly with both research and implementation activities that both educate on the state-of-the-practice, and advance the state-of-the-art. This book aims to educate the transportation industry, and in some cases the general public, about the numerous principles behind quieter pavements, as well as summarising the Long-Term Pavement Performance programs and its major activities.