1. Annual local authority road maintenance (Alarm) survey, asphalt industry alliance, (2010). 〈www.asphaltindustryalliance.com/alarm.asp〉 (Last accessed 05/01/2012)
2. Maintaining Scotland's roads: a follow-up report, audit scotland, (2010) 〈www.audit-scotland.gov.uk/docs/central/2010/nr_110216_road_maintenance.pdf〉 (Last accessed 05/01/2012)
3. The shell bitumen handbook;Read,2003
4. Evaluation of moisture effects on asphalt concrete mixtures;Kennedy;Transp Res Rec,1983