oa Civil Engineering = Siviele Ingenieurswese - Improvements to points and crossings on the South African Railways

Volume 6, Issue 5
  • ISSN : 1021-2000



For many years South African Railway Engineers have felt that the curvature through existing turnouts is too sharp, resulting in undue discomfort to passengers. In this paper new designs are evolved in which switch angles are reduced, curvature flattened and permissible speeds selected to provide for reasonable passenger comfort throughout the turnout. Attention is also given to the improvement of existing sets. Gauge widening and flangeway clearances are arranged to suit all the locomotives in use, and switches are selected accordingly. In addition suggestions are advanced for the use of a high speed superelevated turnout. Many improvements in design detail are recommended, particularly in regard to planing of switches, noses of crossings and guard rails. Methods are also evolved for improving obtuse crossings of diamonds and slips.

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