Layin kariya na babbar hanya ya ƙunshi layukan kariya na ƙarfe mai rufi da ginshiƙai a tsakaninsu, kuma ginshiƙai biyu suna tsakanin layukan kariya na ƙarfe biyu masu rufi. Layin kariya na ƙarfe mai rufi shine babban nau'in wannan layin kariya mai tsauri. Layin kariya na babbar hanya yana amfani da nakasar tushe na ƙasa, ginshiƙi da kuma katako don shan kuzarin da karo na motar ya haifar, yana tilasta wa motar canza alkibla, yana hana motar fita daga hanya da sauri, kuma a lokaci guda. Yana iya taka rawa wajen kare motar da mutanen da ke cikin motar da kuma rage asarar da hatsarin ya haifar.

Dangane da halayen amfani da kayan aikin layin dogo na babbar hanya, masu amfani za su iya zaɓar injin matse iska mai siffar hydraulic, yawanci tan 315, tan 400, tan 500 na injin matse iska mai sanyi na ƙarfe, kuma su yi aiki tare da ƙira don cimma burin yin tambarin layin dogo na babbar hanya sau ɗaya. Tsarin aiki, ingancin sarrafawa yana da girma sosai.

Layin kariya na babbar hanya samfurin ƙarfe ne da aka yi da sanyi. Layin kariya na corrugated yana da ƙarfin shaƙar kuzarin karo, yana da kyakkyawan aikin shigar da gani, yana da sauƙin maye gurbinsa idan ya lalace, kuma yana da hana lalata, hana tsufa, juriyar rana, juriyar zafin jiki mai yawa, juriyar ƙarancin zafin jiki, da sauransu. Siffofi, tsawon rayuwar sabis na waje na iya kaiwa shekaru 10-25, ana iya raba shi zuwa nau'i biyu, ɗaya layin kariya na raƙuman ...

Ana amfani da layin samar da injinan hydraulic na gyaran farantin hydraulic na musamman don tsarin samar da injinan hydraulic na sanyi-press na manyan faranti daban-daban kamar ƙirƙirar farantin expressway guard rail, ragar ƙarfe mai laushi don gadoji, benen gada mai laushi, da sauransu. Wannan kayan aikin yana haɗa katako masu motsi tare ta hanyar haɗin gwiwa, yana aiki tare da sarrafa bawul ɗin harsashi da famfon mai na hydraulic don tabbatar da aiki tare da katako mai motsi, kuma yana danna layin hydraulic guard a lokaci guda.