Inhloso esemqoka aIsithiyo somgwaqo omkhuluemgwaqeni onguthelawayeka wukwenza umgoqo wokuphepha ukusiza ukuvikela umshayeli ophume emgwaqeni.Izigxobo zezinsiza, izinsimbi zamabhuloho kanye nezindonga ezibambayo ezinye izithiyo.Kulezi zimo, ukushaya i- guardrail kungaba ngcono kakhulu kunokushayisa izithiyo, ngakho-ke kuvame ukufakwa ama- guardrail. Anciphisa ubungozi bokuphahlazeka okungase kube khona futhi enze imigwaqo iphephe. I- guardrail ingenza ngezindlela eziningi ekuchezukiseni imoto ibuye. emgwaqeni, ukuyinciphisa noma ukuyimisa, noma kwezinye izimo ivele yehlise ijubane ngokwanele futhi ivumele ukuthi iqhubeke idlule isitimela sokuqapha.