1. Asphalt institute, http://www.asphaltinstitute.org/asphalt-pavement-distress-summary/.
2. Minnesota Dept. of Transportation (MNDOT), Mn/DOT distress identification manual, 2003.
3. Interrater reliability of manual pavement distress evaluations;Bianchini;J. Transp. Eng.,2010
4. South Dakota Dept. of Transportation (SDDOT), Visual distress manual, 2011.
5. Pavemetrics, LRIS: Laser road imaging system. , 2011.