Cika wannan jumla: Saboda tsarin farashin mai canzawa, farashin hanya guda na iya bambanta dangane da wadata da bukatar tafiye-tafiye a lokacin da aka nemi tafiyar. Lokacin da tafiye-tafiye suke da yawa a wani yanki kuma babu wadatattun direbobi a irin wannan yankin, farashi yana ƙaruwa don samun ƙarin direbobi zuwa wannan yankin. A wasu lokuta, wannan ya haifar da matsanancin ƙarin kuɗi a lokacin gaggawa kamar Hurricane Sandy, rikicin garkuwa da Sydney na 2014, da kuma
Harin da aka kai a gadar Landan a shekara ta 2017.