ʻO nā bollard pelu ʻia he mau pou palekana i hana lima ʻia e kaohi i ke komo ʻana o nā kaʻa i nā ala kaʻa, nā wahi kaʻa, a me nā wahi i kaupalena ʻia. Hiki ke hoʻohaʻahaʻa maʻalahi ʻia lākou e ʻae i ka hele ʻana a hoʻopaʻa ʻia i kahi kūlana kū pololei e ālai i nā kaʻa ʻae ʻole ʻia.