TY  - JOUR
PY  - 1991//
TI  - Deterioration and maintenance of unpaved roads: models of roughness and material loss
JO  - Transportation research record
A1  - Paterson, William D. O.
SP  - 143
EP  - 156
VL  - 1291
IS  - 
N2  - Empirical models of deterioration for the management of unpaved roads have been developed. Successive cycles of roughness progression and maintenance bladings are represented as a cyclic process reaching a steady-state pattern. One model predicts the minimum, maximum, and average roughness as functions of traffic volume, road gradient and curvature, physical material properties, rainfall, and the interval between bladings. In a second model, the rate of gravel loss is predicted from similar variables. Both were estimated from extensive data collected in Brazil, and both are compared with data from several other countries in Africa and South and North America, showing a good degree of transferability. The models have been incorporated in the HDM-III model for highway strategy evaluation.<p /> <p>Language: en</p>
LA  - en
SN  - 0361-1981
UR  - http://dx.doi.org/
ID  - ref1
ER  -