However, road transport is often subject to factors which are outside the control of the individual bus operators, such as traffic jams caused by accidents, poor weather conditions and inadequate snow clearance.
Numai că transportul rutier este deseori afectat de factori care nu pot fi controlaţi de operatorii individuali, factori cum sunt ambuteiajele provocate de accidente, condiţiile meteorologice nefavorabile şi deszăpezirea necorespunzătoare a străzilor.