THE EFFECT OF PAVEMENT SPLIT FRICTION PROVISION ON HIGHWAY CURVES

摘要

From the perspective of sprung vehicle dynamics, the design criteria of superelevation or radius is unsatisfactory for broad requirements. Superelevation design has many limitations. Therefore, in this study, we describe a split layout of pavement friction, designed to counterbalance an insufficiency of superelevation. The layout is to provide different friction pavements between the left and the right sides of a lane in curves. Such a layout would cause vehicles to be more stable, in addition to providing passengers with more comfort. There is no deficiency of placing superelevations, of which the inclined cross-sections possibly cause side slipping in bad weather conditions. Also, the ideal values of friction difference for high design speeds versus various radii are illustrated. How to implement a split friction pavement is also introduced accompanied by an analysis of the selection of materials or aggregates. Finally, a special consideration regarding safety for constructing such a pavement is mentioned.