Pierce County has developed and used travel demand models since the early 1990s. The model is used for many projects and programs applied by Pierce County and other agencies. Some model functions are mandated by state law, such as the Washington State Growth Management Act (GMA). The models also support decisions for construction of improved roadways and intersections, and alignment choices for new roadways. Read our guide to modeling to learn more.
In 2009, the Transportation Planning and Programming Division began to refine and enhance our current travel demand model. Puget Sound Regional Council (PSRC) uses theregional travel demand forecasting model. Their model was a major guide for Pierce County's model.
The data that are being collected and processed include:
current and future land use data (population, housing, and employment)