Typical Unpaved Roads Roughness Predicted By the HDM-III Model
WORLD BANK Transport Note
September 30, 1999
Road Asset Management
Rural Roads
http://www.ssatp.org/sites/ssatp/files/publications/HTML/Models/RED_3.2/RED_Add…
Rodrigo S. Archondo-Callao
The World Bank
Infrastructure Notes No. RT-1