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.
If you have questions on how the model works, or would like additional information on the data or procedures used, please contact Mike Jaffe or Ray Jackson at 503-588-6177.