Traffic noise is frequently an annoyance for highway neighbors. Pavement/tire noise is a large component of the overall traffic noise level and has been extensively reviewed. This synthesis presents a comprehensive synopsis of pavement/tire noise as it relates to roadways. Detailed information is presented on acoustical definitions and concepts, the theory of tire/pavement noise generation and current mitigation practice, measurement techniques, interior vehicle noise, reported noise emission results for pavement type and texture, effects of pavement wear, surface friction, and maintenance and safety considerations.  The report for this topic can be purchased at https://www.trb.org/news/blurb_detail.asp?id=3290