Research organisation:
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Swiss Federal Roads Office Road Networks division Secretariat for road Research Pulverstrasse 13, 3063 Ittigen CH-3003 Bern +41 58 463 80 03 (Information) astra.strassenforschung@astra.admin.ch www.astra.admin.ch/dienstleistungen/04844/ www.astra.admin.ch/
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