An immense problem affecting environmental pollution is the unprecedented increase of waste tyre vehicles. Furthermore, rapid economic and industrial growth generates increasing amounts of waste materials includes millions of waste tyre rubber. The lack of proper controlled use of these waste would lead to added disposal costs, increase illegal dumping or inadequate storage and could increase the risk of fire and environmental damage. In this book, attempts to inspire a green technology which is more environmentally friendly that can produce economic value are a major consideration in the utilization of waste tyre rubber in the form of Crumb Rubber Modifier (CRM) in asphalt concrete. This book investigated the fundamental aspects of modified asphalt binder and mixtures in order to better understand the influence of CRM modifiers on the mechanical properties of asphalt binder and mixture.