  The typical transverse momentum of a quark in the proton is a basic property
of any QCD based model of nucleon structure. However, calculations in
phenomenological models typically give rather small values of transverse
momenta, which are difficult to reconcile with the larger values observed in
high energy experiments such as Drell-Yan reactions and Semi-inclusive deep
inelastic scattering. In this letter we calculate the leading twist transverse
momentum dependent distribution functions (TMDs) using a generalization of the
Adelaide group's relativistic formalism that has previously given good fits to
the parton distributions. This enables us to examine the $k_{T}$ dependence of
the TMDs in detail, and determine typical widths of these distributions. These
are found to be significantly larger than those of previous calculations. We
then use TMD factorization in order to evolve these distributions up to
experimental scales where we can compare with data on $\langle k_{T} \rangle$
and $\langle k^{2}_{T} \rangle$. Our distributions agree well with this data.
