Bollards ndi malo omwe amaikidwa m'madera monga misewu ndi misewu kuti azitha kuyendetsa galimoto komanso kuteteza oyenda pansi. Zopangidwa kuchokera kuzinthu monga chitsulo chosapanga dzimbiri, chitsulo cha kaboni, kapena pulasitiki, zimapereka kukhazikika kwabwino komanso kukana kugunda.

Mabotolo agalimoto amabwera m'mitundu yokhazikika, yosasunthika, yopindika, komanso yodzikweza yokha. Mabola okhazikika ndi ogwiritsidwa ntchito kwa nthawi yayitali, pomwe otayika komanso opindika amalola mwayi wofikira kwakanthawi. Mabotolo onyamulira okha nthawi zambiri amagwiritsidwa ntchito m'mayendedwe anzeru pamagalimoto osinthika.