SKATS has developed a travel demand model for the Salem-Keizer metropolitan area to assist policymakers in making informed decisions regarding future transportation needs. This model is a software program that is used to forecast travel patterns and traffic volumes on existing and proposed roadways and streets.
Travel demand models require the following data:
The model uses all this information to determine how many trips for each purpose (work, shop, etc.) are made by mode and time of day. The relationships between travel time and the “attractiveness” of a destination determine the starting and ending locations of trips. Information on the street system (speed, capacities, congestion) determines on which streets the trips are assigned. The model is continuously adjusted until the results match traffic counts. At this point, the model can be used with population and employment forecasts to analyze future traffic volumes on existing or new streets.
Consultants working on projects within the SKATS Metropolitan Planning Organization’s boundary may request model runs and output. The services available is described in the document “Modeling Services at the Mid-Willamette Valley Council of Governments“, which includes the current fees for this service. Available separately is a map of the current (2019) Transportation Analysis Zones.
If you have questions on how the model works, would like additional information on the data or procedures used, or would like to discuss model runs and/or output for your project, please contact Mike Jaffe or Ray Jackson at 503-588-6177.