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Technical Tools

The Oregon Department of Transportation has a suite of transportation and land use modeling and analysis tools available to help provide information to complex questions that communities or policy makers might be facing. These tools are used when an agency or a community wants to evaluate potential ramifications of policy actions, and to evaluate how a combined set of plans, programs and actions work together to produce a specific result. ODOT has an extensive toolbox that can be used to inform many different transportation questions.

Analysis Tools

The Analysis Procedures Manual provides the current methodologies, practices and procedures for conducting long term analysis of ODOT plans and projects.

Critical Rate Calculator: The calculator performs crash rate analysis and identifies priority intersections or segments for further safety analysis. For information on how to use this spreadsheet, see Chapter 4 of the Analysis Procedures Manual Version 2.

Excess Proportion of Specific Crash Types Calculator: The tool performs statistical analysis to calculate a probability of specific crash types exceeding a threshold proportion. For information on how to use and interpret this spreadsheet, see the instructions packaged with the spreadsheet and Chapter 4 of the Analysis Procedures Manual Version 2.

Saturation Flow Rate Calculator: The tool uses the Highway Capacity Manual 2010 method for calculating saturation flow rates from field data. For information on how to use this spreadsheet, see Chapter 3 of the Analysis Procedures Manual Version 2.

Signal Progression Calculator: The tool estimates the minimum required progression bandwidth for a signalized system based on volumes at the critical intersection. For information on how to use this spreadsheet, see Chapter 10 of the Analysis Procedures Manual.

Synchro/SimTraffic Templates: The files were created as a tool to both save time and reduce errors when starting Synchro analysis. All parameters are set following ODOT’s Synchro/SimTraffic settings provided in Chapters 7 and 8 of the Analysis Procedures Manual. For additional information on how to use the template files and the changes that were made, refer to the README document that is included in the zip file.

Heavy Vehicle Pavement Design Spreadsheet: This tool is used to calculate future heavy vehicle volumes for pavement design. See Chapter 6 of the Analysis Procedures Manual for information on how to use this spreadsheet.

TruckSum: This tool is used to process ODOT-counted 12-hour or greater counts. For information on how to use this spreadsheet, see Chapter 11 of the Analysis Procedures Manual.

Count Processors: These spreadsheet tools are used to process count data output from the ODOT Traffic Count Management program for input into Visum or ArcGIS. For instructions on use of these tools refer to Analysis Procedures Manual Appendix 17A.

Preliminary Traffic Signal Warrant Analysis Form: This tool may be used to assist in preparing the preliminary traffic signal warrant PSW form. For guidance on preliminary signal warrant analysis, see Chapter 7 of the Analysis Procedures Manual.

Single Lane Roundabout Calculator: For each approach, the Roundabout Calculator produces conflict flow, entry flow, capacity, pedestrian impedance factor, v/c ratio, control delay, Level Of Service, and 95th percentile queue data. Chapter 7 of the Analysis Procedures Manual Version 1 provides procedures for roundabout analysis.

Two-Way STOP Controlled Intersection Calculator: This tool is intended for use in facilitating the Queue Length Estimation at Two-Way STOP Controlled Intersection analysis methodology. For more information on the use of this tool, see Chapter 11 of the Analysis Procedures Manual.

Separated/Buffered Bikeways Calculator: This tool performs analyses on the operation of separated bikeways and buffered bike lanes. For more information, see Chapter 14 of the Analysis Procedures Manual Version 2.

Simplified MMLOS Calculator: This tool implements streamlined segment-level pedestrian, bicycle and transit analysis methodologies based on the Highway Capacity Manual 2010. For more information see Chapter 14 of the Analysis Procedures Manual Version 2.

Shared Path Calculator: This tool implements the Highway Capacity Manual 2010 Chapter 23 method shared path methodology for pedestrian and bicyclists. For more information see Chapter 14 of the Analysis Procedures Manual Version 2.

Queue and Delay Cost Worksheet: This tool is a simplified spreadsheet calculator for sketch planning level evaluation of bottlenecks on freeways and multilane highways. The tool estimates vehicle queue length, delay, and user cost of delay for conditions where demand exceeds capacity for one or more hours of the day. For more information see Chapter 10 of the Analysis Procedures Manual Version 2.

Modeling Tools

The Oregon Statewide Integrated Model, or SWIM, is an integrated land use transport model covering the entire State of Oregon. It is a second generation model, drawing on previous work done on the First Generation based Statewide Model and the Eugene-Springfield UrbanSim Model. The SWIM2 model incorporates the interaction between Oregon’s economy, land use and transportation systems using a set of connected modules that cover different components of the full system.

  • Economic Model: determines the growth of the state’s economy.
  • Population Synthesizer.
  • Location Model: allocates business productions and transactions.
  • Aggregate Land Development: identifies land availability.
  • Person travel.
  • Commercial goods transport.
  • External goods transport.

Contact

 Becky Knudson
 503-986-4113

The Greenhouse Gas Strategic Transportation Energy Planning, or GreenSTEP, model was developed by ODOT to estimate and forecast the long term effects of policies and other influences (e.g. gas prices) on the amount of vehicle travel, the types of vehicles and fuels used, energy consumption for vehicle travel and resulting greenhouse gas emissions. The Regional Strategic Planning Model​, or RSPM, is a metropolitan version of the statewide GreenSTEP model being used in scenario planning efforts in various Oregon communities.

Evaluation of the GreenSTEP model at the national level lead to the Federal Highway Administration adopting GreenSTEP as the basis for their Energy and Emissions Reduction Policy Analysis Tool. In 2010, the American Association of State Highway and Transportation Officials awarded ODOT staff its Presidents Award for Planning for the development of the GreenSTEP model. The family of GreenSTEP models is transitioning to the VisionEval Open Source Project common framework.

For forecasting highway needs and to simulate system performance, the Transportation Planning Analysis Unit uses the Highway Economic Requirements System - State Version, or HERS-ST, software that the Federal Highway Administration provides.

The state highway system is evaluated for existing and future deficiencies based on various user defined criteria. Once deficiencies are identified, improvements are selected according to economical principles and then future system performances are simulated. The modeling analysis is bounded by funding level and future years analyzed. Output includes key system performance and improvement costs.

Reports and Resources

In-House Reports

Posters

Travel demand models are used for transportation project development, transportation planning and land use planning. To request a model run please use the form below.

Request for Travel Demand Model Run Form

Note: To fill out the form above, please right-click on the link and select 'Save Link as' or 'Save target as'. Save the PDF to your computer, then open and fill out using the latest version of Adobe Acrobat or Adobe Reader.

Oregon Travel Demand Models Map
Travel Demand Model Development and Application Guidelines

Resources

Modeling Procedures Manual for Land Use Changes

R Resources

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