Despite growing awareness of its various problems, private automobile
use is still seen as an inviolable individual freedom. We consider the
ethical arguments for and against private automobile use with particu
lar reference to John Stuart Mill's theory of freedom. There is much e
vidence to show that private automobile use is an other-regarding harm
ful activity that is, therefore, on Mill's terms, liable to public con
trol. Although it cannot be an entirely self-regarding activity, we co
nsider private automobile use in this category and argue that even on
Mill's terms it can properly be subjected to extensive control. We als
o challenge Mill's theory and argue that private automobile use lacks
adequate moral justification. We then consider the policy implications
of this ethical argument and review some of the policy options availa
ble. We conclude that although an immediate total ban on private autom
obile use is justifiable, it is inadvisable at this time and that more
limited, but effective control should be implemented in preparation f
or a total ban.