Bisa ga binciken da aka yi a baya da binciken filin, shimfidar kwalta yana da tasiri ta hanyar canzawa, sha, oxidation, da halayen photochemical na pavement, kuma rabon kwalta ya ragu sosai a ƙarƙashin yanayin tsufa na farko, wanda ya haifar da raguwa da raguwa. Tare da ƙarin lalacewa na kwalta, layin da ke da matsakaicin matsakaici yana fallasa abubuwan da ke ciki. Tafarkin kwalta yana shiga matakin tsufa saboda ci gaba da tsagewa da yanayin yanayi, inda duwatsun ke fallasa ga ƙananan barbashi a kan layin.

A lokacin tsarin tsufa, rashin daidaituwa da ƙarfin tsarin ginin yana raguwa. A ƙarshe, matsanancin bakin ciki na bakin titi yana faruwa a cikin nau'i na tsage-tsalle na layi, tsagewar alligator, ramuka da rutting. Wannan tsari yana rage danko da tsinkewa sosai, yana ƙara ductility da sassauci, kuma yana sa kwalta ta zama ƙasa da ƙasa ga fashewa da lalacewa.
Ba kamar rigunan hatimi na tsohuwar zamani ba, aikace-aikace guda ɗaya na sashin gwajin sabunta kwalta yana shiga cikin daf ɗin don maidowa da maye gurbin kwalta da kwalta da suka ɓace saboda yanayin iskar oxygen da ƙasa da kwalta mai kariya. Har ila yau, yana rufe tare da kare shingen daga ruwa, hasken rana da gurɓataccen sinadarai, yana inganta ɗorewa, rayuwa da kuma rage kyawon kwalta. Masu hada kwalta suna tunatar da ku cewa kulawa da kyau shine mabuɗin kare kwalta daga abubuwan waje waɗanda ke lalacewa da tsagewa.