Amphibians such as frogs, toads, newts and salamanders in built-up areas are in grave danger due to the loss of natural habitat. Grass frogs and European toads can only multiply in ponds in which they themselves began their life. In the spring they wander from their "hunting areas" to the ponds and pools of their youth. If, in doing so, they have to cross a heavily trafficked road, death is certain and the extermination of their kind. Swiss road builders therefore work in accordance with standard no 640.697, which describes the behavioural pattern of amphibians and provides the designer with information for use in providing protective measures when planning a new road. This includes the provision of ponds at the side of a road and barring the crossing with a fence at least 40 cm high, which forces the amphibians to use the pool provided. Grass frogs need 3 to 5 years, toads 5 to 8 years to become acclimatised to the change of habit. Where this protective measure is not possible, roads should be cut off and specially constructed 0ulverts provided. Note should be taken of how far the animals are steered out of their normal route - care should be taken if it is more than 60 degrees. With all the measures care should be taken to prevent the drying out of the animals. A further report will be made on investigations being carried out in canton Zurich. (TRRL)

  • Corporate Authors:

    Vereinigung Schweizerische Strassenfachleute (VSS)

    Seefeldstrasse 9
    Zurich,   Switzerland 
  • Authors:
    • Keresztes, J
    • Zuercher, H
  • Publication Date: 1978-3


  • German

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00325695
  • Record Type: Publication
  • Source Agency: Bundesanstalt für Straßenwesen (BASt)
  • Files: ITRD, TRIS
  • Created Date: Sep 16 1981 12:00AM