Crumb rubber is being used to a greater extent in many states in rubberized asphalt applications and is the largest single use of recycled rubber. Its benefits include noise reduction, shorter breaking distances, reduced road maintenance and more cost-effective, durable road surfaces. Arizona and California are the leaders in rubberized asphalt consumption.
Crumb rubber also serves a number of sports and recreational purposes. Used in shock-absorbing running tracks and ground cover under playgrounds, the springy and responsive nature of rubber decreases the impact of running or falling. Also added to soil under playing fields, crumb rubber improves drainage and root structure of grass. Crumb rubber applications accounted for 12 percent of scrap tire use in 2005.