The bollard is mainly used to block access to vehicles, although they are also used for the protection of premises, avoiding landings or roads where access is only for pedestrians.
Most bollards are made of steel, although we can find it made of aluminum because they better withstand exposure to the elements, such as rain and oxidation. Among them we can find several tipThe bollards, their fixation to the ground is usually always the same, bolted to the ground using 4 to 6 screws. Other anchoring systems are to bury the bollard using cement, having a structure more solid but difficult to disassemble.
Within the different types according to their design we can find:

• 
  Fixed Bollards:
  The bollard with fixing to the ground by means of cement directly to the ground.
• 
  BRemovable files:
  They are those whose fixation is designed to be extracted, either using a padlock or a key.
• 
  Retractable Bollards:
  They are those that allow to hide in the ground to allow access.
• 
  Bollards:
  Are those that are designed to avoid landings, are designed to withstand big blows.

By default they are usually colored toMarillo with refracting horizontal ribbons, which help in the night to be detected by the drivers easily.