Parietal clothoid

from Wikipedia, the free encyclopedia
Vertex clothoid in the site plan
Band of curvature of the parietal clothoid

The vertex clothoid is a sequence of design elements in the alignment of roads and railways . As a special case of the compound curve, it arises when the two clothoid pieces collide directly in the common apex radius. In practice, the use of the vertex clothoids is limited, as they are only used in exceptional cases due to the jerky driving style at the vertex. In order to minimize the problem of jerky driving, the impact radius should not fall below certain minimum sizes. For example, the RAS-L valid in Germany specifies the following limit values ​​for the alignment of roads:

  • for road category A: R s = 450 m
  • for road categories BI and B II: R s = 250 m

Individual evidence

  1. ^ Günter Wolf: Street planning . Werner Verlag, Munich 2005, ISBN 3-8041-5003-9 , pp. 138 .