Analysis of Solutions for Superelevation Design From the Standpoint of Efficient Drainage

The determination of pavement cross slope is an integral part of the geometric design of roads. It is performed due to reasons of driving dynamics, i.e. to ensure lateral stability of a vehicle in a curve and also to assure optimal drainage of the pavement. Empirical knowledge, incorporated in guidelines for road design in many countries, indicates that the minimum value of the cross slope to ensure sufficient drainage is 2.5%, which is also the common value on the tangent parts of the road. The problem occurs on parts of the route between the opposite curves in which, due to the need for change in cross slope direction, the cross slope ranges from 0-2.5%. A particular problem occurs on parts of the route with (too) small longitudinal gradient, which does not ensure efficient drainage in the longitudinal direction. The subject of this paper is an analysis of options for superelevation design in a number of countries (CRO, D, A, CH, UK, USA, AUS), and a critical comparison of available solutions, considering the criteria of efficiency or optimization of pavement drainage.

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  • English

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  • Accession Number: 01630563
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Mar 19 2017 11:55PM