The Pierce county activity based model is build on SoundCast which is a travel demand model system built for the Puget Sound Region. The model depict diverses human travel behavior and include travel sensitivity to land use and the built environment. Read the user's guide to learn more.
PierceCast base year scenario inputs are here (private repository): https://github.com/RSGInc/PierceCastScenarioInputs The PierceCast PopulationSim setup can be found here (private repository): https://github.com/RSGInc/PierceCastPopulationSim