bollards

/B AA1 L ER0 D Z/
noun
  1. 1

    A strong vertical post of timber or iron, fixed to the ground and/or on the deck of a ship, to which the ship's mooring lines etc are secured.

  2. 2

    A similar post preventing vehicle access to a pedestrian area, to delineate traffic lanes, or used for security purposes.

Source: https://en.wiktionary.org/wiki/bollard, https://en.wiktionary.org/wiki/bollards