He painga anō hoki ō ngā ara kawe ngokingoki, pērā i te iti o ngā whakaritenga mō te mata o te rori, te pai o te mahi whakawhiti whenua, me te āhua tiaki o te ara. Hei whakatika i te take o te kino o ngā waka ara, ka tīmata ētahi tāngata ki te mahi i te ara. Hei tauira, i whakakapia te ara maitai taketake ki te rauemi rapa, e kore e whakaiti noa i te kino engari he mahi anō hoki mō ētahi atu kaupapa.