1. ASTM D5340, Standard Test Method for Airport Pavement Condition Index Surveys.
2. ASTM D6433. Standard Practice for Roads and Parking Lots Pavement Condition Index Surveys.
3. Site Specific Project;G. D. Cline,2001
4. Cline, G D., Shahin, M. Y., and Burkhalter J. A. (2002). Automated Pavement Condition Index Survey, Transportation Research Board.
5. Eaton. R. A., Gerard, S., and Gate, S. W. (1988). Rating Unsurfaced Roads. U.S. Army Cold Regions Research & Engineering Laboratory. Special Report 87-15. revised September 1988.