The Transportation Planning Analysis Unit (TPAU) constructs, houses, and maintains Travel Demand Models (TDM) for urban areas through out the state of Oregon. In 2007 TPAU revised the model for Redmond, Oregon. The Redmond model was originally released in 2003, but significant new land use projects required an expansion and update of the Redmond TDM.
This seemingly straight forward review and expansion of the model faced several challenges that proved to be challenging and rewarding. First, over the four year time span since the Redmond model was first released, several upgrades to the model logic maintained by TPAU had been made and needed to be applied to the revised Redmond model. These upgrades included, improved reporting capabilities, graphical interface, and simplified storage and access of model results.
Second, along with expanding the model boundaries and incorporating new land use development and assumptions came updating the Redmond Model road network to include all current projects on the ground and in the development in addition to future projects planned for the future. Both land use and network changes required review and collaboration with city, county, and state agencies to assure all projects and issues were being addressed and incorporated correctly.
Third, Redmond is located in Central Oregon approximately seventeen miles north of Bend. Central Oregon, but especially the city of Bend has been experiencing high growth over the past few years. Accompanying this growth are large resorts outside of city limits. These resorts act as small cities; however are outside of all current model boundaries making accounting for the influence they create a challenge. Part of revising the Redmond model included creating a submodel logic to account for future destination resorts and their traffic patterns in Central Oregon.
Next steps, currently TPAU is creating a full Central Oregon Model which will be able to better account for the growth in Central Oregon, interactions between closely spaced cities, and destination resorts. This model will help TPAU better assess future interaction between the population areas in Central Oregon, mainly the give and take between competing expansion areas and the implications to current and planned infrastructure.