Bollards are short, sturdy, vertical posts or barriers used to control vehicle and pedestrian traffic, protect infrastructure, and secure areas by limiting or preventing access. They are made from various materials, including steel, concrete, or plastic, and can be fixed, removable, flexible, or retractable (automatic), each type serving different safety and access control functions. Bollards are commonly found in commercial properties, parking lots, and public spaces for traffic calming, pedestrian safety, and protecting buildings or assets from vehicle impacts.