Iintsimbi zokulinda ezimacala omabini zisetyenziselwa ubukhulu becala indawo eluhlaza kamasipala, iibhedi zeentyatyambo zasegadini, indawo eluhlaza, iindlela, izikhululo zeenqwelo-moya, kunye neengcingo zamajukujuku aluhlaza. Iimveliso ze-wire guardrail ezinamacala amabini zinenkangeleko entle kunye nemibala eyahlukeneyo. Abagcini nje ukudlala indima yocingo, kodwa baphinde badlale indima yobuhle. I-guardrail ye-wire guardrail inesakhiwo esilula segridi, intle kwaye iyasebenza; kulula ukuthutha, kwaye ukufakela kwayo akuthinteli ukuguquguquka komhlaba; ikwazi ukulungelelanisa ngakumbi iintaba, amathambeka, kunye neendawo ezigobileyo; ixabiso olu hlobo lwe-bilateral wire guardrail luphantsi ngokuphakathi, kwaye lufanelekile Ukusetyenziswa kwinqanaba elikhulu.