Choyamba, chifukwa cha mawonekedwe amtundu wachitetezo chothamanga kwambiri, ndizomwe zimapangidwira poyambira zitsulo.Choncho, chinthu chachikulu chomwe chimakhudza mtengo wake ndi chitsulo.Monga ife tonse tikudziwa, mtengo Mzere zitsulo ndi kosakhazikika, kwenikweni kusintha tsiku lililonse, ndi guardrail chifukwa siteji panopa chitukuko msika wafika nthawi ya phindu laling'ono koma zotuluka mwamsanga, amene mwachindunji kumabweretsa guardrails.Mtengo wachitsulo sunathe kukwanitsa kukwanitsa kusintha kwa mtengo wachitsulo, ndipo ukhoza kusinthasintha ndi kusinthasintha kwa mtengo wazitsulo zachitsulo.

Pamene msika ukukwera, umatsatiridwa mosasamala ndi kukwera kwachitsulo, ndipo pamene mtengo wamsika umatsitsidwa, kuti ukhalebe ndi ntchito yabwino ya fakitale, idzachepetsa mtengowo.Ichi ndichifukwa chake mtengo wa ma guardrails umasinthasintha pafupipafupi.Choncho, padzakhala makasitomala ambiri omwe ali ndi nthawi yayitali yomanga komanso kufunika kwakukulu kupyolera mukuyembekezera ndikuwona ndikumvetsetsa kuti adzayika chiwerengero chachikulu cha malamulo pamene mtengo wa guardrail uli wotsika, kulipira ndalama zina za deposit ku. wopanga guardrail, kusaina pangano, ndi kutseka mtengo, kotero palibe chifukwa chodandaula za kulipira chifukwa kukwera mitengo msika.Ndalama zambiri zimatha kusunga ndalama zambiri.