  Quark-Gluon plasmas produced in relativistic heavy-ion collisions quickly
expand and cool, entering a phase consisting of multiple interacting hadronic
resonances just below the QCD deconfinement temperature, $T\sim 155$ MeV.
Numerical microscopic simulations have emerged as the principal method for
modeling the behavior of the hadronic stage of heavy-ion collisions, but the
transport properties that characterize these simulations are not well
understood. Methods are presented here for extracting the shear viscosity, and
two transport parameters that emerge in Israel-Stewart hydrodynamics. The
analysis is based on studying how the stress-energy tensor responds to velocity
gradients. Results agree with expectations based on Kubo relations.
