I-quota yokusabalalisa itiyela q (L/㎡) iyahlukahluka ngento yokwakha, futhi ububanzi bayo bumi kanje:
1. Indlela yokungena isakazeka, 2.0~7.0 L/㎡
2. Ukusabalala kokwelashwa kwendawo, 0.75~2.5 L/㎡
3. Ukusabalala kothuli, 0.8~1.5 L/㎡
4. Ukusabalalisa okubophayo okuphansi, 10~15 L/㎡.

I-quota yokusabalalisa i-asphalt icaciswe ekucacisweni kobuchwepheshe bokwakha.
Izinga lokugeleza elingu-Q (L/㎡) lephampu ye-asphalt liyashintsha ngesivinini salo. Ubudlelwano bayo nesivinini semoto engu-V, ububanzi obunwebekayo b, kanye nenani elisakazekayo q lithi: Q=bvq. Ngokuvamile, ububanzi bokusabalalisa kanye nenani lokusabalalisa kunikezwa kusengaphambili.
Ngakho-ke, isivinini semoto kanye nokugeleza kwephampu ye-asphalt kuyiziguquko ezimbili, futhi lezi ezimbili zikhuphuka noma zehla ngokulinganayo. Ngokusabalalisa i-asphalt enenjini ekhethekile eshayela iphampu ye-asphalt, isivinini sepompo ye-asphalt nesivinini semoto singaba
kulungiswa izinjini zazo, ngakho-ke ubudlelwano bokukhula nokuncipha obuhambisanayo phakathi kwalokhu okubili bungakwazi ukuhlanganiswa kangcono. Kwabasabalalisi be-asphalt abasebenzisa injini yemoto ukushayela iphampu ye-asphalt, kunzima ukulungisa
ubudlelwano obuhambisanayo bokukhuphuka nokuncipha phakathi kwejubane lemoto kanye nejubane lephampu ye-asphalt ngoba izindawo zamagiya ebhokisi lemoto kanye nokumuka kwamandla kulinganiselwe, futhi ijubane lephampu ye-asphalt liyashintsha ngesivinini
injini efanayo. Ngokuvamile, inani lokugeleza kwepompo ye-asphalt ngesivinini esithile kunqunywa kuqala, bese kulungiswa isivinini semoto esihambisanayo, futhi insimbi yamasondo amahlanu kanye nokusebenza okunekhono komshayeli kusetshenziselwa ukulwela ukushayela okuzinzile.