causeways

/K AO1 Z W EY0 Z/
noun
  1. 1

    A road that is raised, so as to be above water, marshland, and similar low-lying obstacles. Originally causeways were much like dykes, generally pierced to let water through, whereas many modern causeways are more like bridges or viaducts.

Source: https://en.wiktionary.org/wiki/causeway, https://en.wiktionary.org/wiki/causeways