Citation

Anderson P, Sessions J. Transp. Res. Rec. 1991; 1291: 15-19.

Copyright

(Copyright © 1991, Transportation Research Board, National Research Council, National Academy of Sciences USA, Publisher SAGE Publishing)

DOI

unavailable

PMID

unavailable

Abstract

Steep road grades provide managers with a way to reduce the economic and environmental costs of transportation systems. Available formulas for calculating log truck gradeability do not consider the performance of log trucks on horizontal curves. The maximum grade that a log truck can climb on a circular curve is less than that on a tangent for a number of reasons. These factors are discussed and some preliminary results obtained from a mathematical model are presented. Predictions from the mathematical model are compared with field observations collected from a survey of steep road operations from forest road managers throughout the USDA Forest Service.

Language: en

Keywords

Conferences; Mathematical models; Field studies; Forecasting; Alternatives analysis; Slopes; Curves (Geometry); Performance; Horizontal curvature; Field observation; Low volume roads; Forest roads; Grades; Logging roads; Logging trucks