Since the height of the barrier can only be adjusted through the addition and removal of stoplogs, finding a lighter and stronger material other than wood or concrete became a more desirable choice. Other materials, including steel and composites, can be used as stoplogs as well.
Given that the elevation of the barrier depends on adding or removing stoplogs, using a lighter and sturdier material other than wood or concrete has become more appealing. Steel and composite materials are suitable options for use as stoplogs.