  We study the temperature dependence of the conductivity due to quantum
interference processes for a two-dimensional disordered itinerant electron
system close to a ferromagnetic quantum critical point. Near the quantum
critical point, the cross-over between diffusive and ballistic regimes of
quantum interference effects occurs at a temperature $ T^{\ast}=1/\tau \gamma
(E_{F}\tau)^{2}$, where $\gamma $ is the parameter associated with the Landau
damping of the spin fluctuations, $\tau $ is the impurity scattering time, and
$E_{F}$ is the Fermi energy. For a generic choice of parameters, $T^{\ast}$ is
smaller than the nominal crossover scale $1/\tau $. In the ballistic quantum
critical regime, the conductivity behaves as $T^{1/3}$.
