We demonstrate experimentally that the transitions between adjacent in
teger quantum Hall (QH) states are equivalent to a QH-to-insulator tra
nsition occurring in the top Landau level, in the presence of an inert
background of the other completely filled Landau levels, each contrib
uting a single unit of quantum conductance, e(2)/h, to the total Hall
conductance of the system. The equivalence holds for numerical paramet
ers describing the transition, as well as for the recently discovered
reflection symmetry of the resistivity.