Imwe mumikorere yibanze ya bollard ni uguhagarika ibitero byimodoka. Muguhagarika cyangwa kwerekera ibinyabiziga, bollard irashobora gukumira kugerageza gukoresha imodoka nkintwaro ahantu hateraniye abantu benshi cyangwa hafi y’ahantu hakomeye. Ibi bituma bakora ikintu gikomeye mukurinda ahantu hazwi cyane, nk'inyubako za leta, ibibuga byindege, nibikorwa rusange.