To investigate the fundamental causes of utility air voids content failures in asphalt layers to achieve Specification for the Reinstatement of Openings in Highways (SROH) compliant performance

Satisfactory performance of reinstatements works even comprising SROH non-compliant air voids contents. Photograph taken; (a) after 27 months of installation, (b) after 12 years of installation (Stopps, 2014).