Citation

Craus J, Polus A. Transp. Res. Rec. 1977; 631: 1-4.

Copyright

(Copyright © 1977, Transportation Research Board, National Research Council, National Academy of Sciences USA, Publisher SAGE Publishing)

DOI

unavailable

PMID

unavailable

Abstract

Some aspects of the design of spiral transition curves on highways are discussed, and a model for the relation between the design speed and the rate of change of centrifugal acceleration is presented. The model is based on the principle that higher speeds require higher comfort. An identity between the spiral length given by the model and the length of the superelevation runoff is assumed. A modified criterion for the maximum relative slope of the centerline and the edges of a two-lane pavement is proposed. The values for the rate of change of centrifugal acceleration and the maximum relative slope suggested are shown to be reasonable.