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Maintenance of retaining structures on the Swiss motorways and national roads

The Swiss motorways and national roads are being completely modernised in maintenance sections. All structures are regularly checked according to national and Fedro standards and maintenance measures are implemented where necessary. Completed maintenance projects concerning retaining structures have shown that the danger of corrosion cannot be neglected. In order to ensure the availability of the network in the long term, several retaining structures have been preventatively strengthened, including with the aid of risk‐based approaches. For this purpose, five research projects have been initiated. The procedure of Fedro for the maintenance of retaining structures is presented through examples from project studies.