What role has the Asphalt-Rubber friction course played in improving our Interstate highways?
• The ARFC is the final surface course placed on virtually all of our Interstate highways. • The ARFC is easy to place and allows the contractor to construct a very smooth final surface. Has ADOT conducted any tests to verify the noise reduction of ARFC? • Limited tests have been done to date. • ADOT sponsored a research project in 1995 that indicated a noise reduction of 3-5 decibels. • Public opinion is that rubberized asphalt is quieter. What is the design life of ARFC? • It’s not yet established, but 10-14 years is certainly possible. • We have some ARFCs over concrete that are 13 years old and still performing adequately. • AR-ACFCs are designed to last 7-10 years when used over PCCP pavements. Arizona has excellent relationships with industry. What has ADOT done to accomplish this and what benefits are seen from developing these good relationships? • We have committed to being a partner with industry and this partnering effort touches all phases of our business, from design throu
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