Isisindo somzila wokuvikela umgwaqo ngonyawo ngalunye sinquma intengo yomzila wokuvikela. Imininingwane yomzila wokuvikela umgwaqo omkhulu ihlukile, ngakho-ke isisindo somzila wokuvikela umgwaqo ngonyawo ngalunye sihlukile.
Isisindo somzila wokuvikela umgwaqo ngonyawo ngalunye sibalwa ngokuhlukanisa isisindo somzila wokuvikela umgwaqo ngobude obuphelele, bese siphindaphindwa ngonyawo olulodwa, futhi umphumela uba isisindo somzila wokuvikela umgwaqo ngonyawo ngalunye.

Isisindo sereli yokuvikela umgwaqo omkhulu ngonyawo ngalunye asikashintshi, ngoba imininingwane nezinto zokwakha zereli yokuvikela zihlukile, ngakho-ke isisindo sihlukile.

Isisindo esicatshangelwayo sesisindo somkhondo womgwaqo ngonyawo sincane kunesisindo sangempela somkhondo womgwaqo, ngoba isisindo sensimbi eShayina sibalwa ngokwehluka okulandelayo.

Kunezinhlobo eziningi zezinto ezingafaneleki kahle ze-guardrail, hhayi ukuthi umenzi usebenzisa izinto ezingafaneleki kahle, kodwa ukuthi umenzi uzilungiselela ngokwezidingo zekhasimende, ngoba ikhasimende kufanele libe ne-guardrail encane kanye ne-post ukuze lilondoloze inzuzo ukuze lenze inzuzo, ukuze isisindo se-guardrail yomgwaqo ngonyawo ngalunye sibe lula. Ngemuva kuka-2014, izidingo zikazwelonke ze-guardrail ziqinile kakhulu. Isisindo se-guardrail yomgwaqo ngonyawo ngalunye kumele sifinyelelwe, futhi ungqimba lwe-galvanized olulwa nokugqwala kumele lufike ku-600 g/.