The pre-determined breaking point is a defined narrowing in the junction piece serving as the link between the bollard and base. It ensures that, if damaged, only the junction piece gives way, preventing any damage to the bollard or foundation.  The pre-determined breaking point has also been designed so that the breaking point is always below ground level. This stops any broken fragment of the base from sticking out and posing a tripping hazard to the elderly or people with impaired vision.