Analysis Procedures Manual
Oregon Modeling Improvement Program
In 1994 the Oregon Department of Transportation launched the Oregon Modeling Improvement Program. This effort included developing computer models to predict wide-ranging effects of transportation, land use and economic changes. The work is coordinated with the Metropolitan Planning Organizations (MPOs) and other state agencies through the Oregon Modeling Steering Committee. The models evaluate statewide, regional and urban transportation issues to produce comprehensive evaluations of proposed policies, plans and projects.
Urban Travel Demand Models
To request a model run please use the Model Request Form.
(Click on the map to enlarge)
Statewide models are long range planning tools designed to evaluate conditions under various circumstances related to transportation, land use, economic factors and public policy.
- Statewide Integrated Model - a long range policy planning tool characterizing the dynamic interaction between Oregon's economy, land use and transportation systems.
GreenSTEP is a strategic planning model that estimates the effects of a large variety of policies and external influences such as fuel prices on household vehicle travel and associated energy consumption and greenhouse gas emissions.
Land Use Models
Sample work by the Transportation Planning Analysis Unit
Greenhouse Gas Emissions Reduction Toolkit
The Greenhouse Gas Emissions Reduction Toolkit is designed to help local jurisdictions identify and explore the kinds of actions and programs they can undertake to reduce vehicle emissions, as well as meet other community goals, such as spur economic development, increase biking and walking, support downtowns, create healthy livable communities, and more.
Highway Economic Requirements System (HERS-ST)
HERS-ST is used to support needs analysis for the Congestion Management System (CMS), as well as numerous other studies such as the Oregon Highway Plan, local corridor studies and system plans.
Safety Analysis Tools
Signalized Intersection Tools
- Critical Rate Calculator
Critical Rate Calculator - This Excel spreadsheet implements the Highway Safety Manual Critical Rate network screening methodology. The user enters crash totals, AADT and other data within a study area. 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 Analysis Procedures Manual (APM) Version 2.
- Excess Proportion of Specific Crash Types Calculator
Excess Proportion of Specific Crash Types Calculator - This Excel spreadsheet implements the Highway Safety Manual Excess Proportion of Specific Crash Types network screening methodology. The user inputs ODOT crash data within a study area. The tool performs statistical analysis to identify intersections with an excess proportion of specific crash types, which are flagged for further safety analysis. For information on how to use this spreadsheet, see Chapter 4 of Analysis Procedures Manual (APM) Version 2.
Transportation Planning Online Database (TPOD)
- Saturation Flow Rate Calculator
Saturation Flow Rate Calculator - This Excel spreadsheet implements the Highway Capacity Manual 2010 method for calculating saturation flow rates from field data. For information on saturation flow rate field data collection and how to use this spreadsheet, see Chapter 3 of Analysis Procedures Manual (APM) Version 2.
- SIGCAP 2 (Not compatible with Windows 7)
- SIGCAP2 is a signalized intersection capacity analysis tool for planning purposes. It calculates intersection level-of-service (LOS) using the volume-to-capacity (v/c) ratio. SIGCAP and SIGCAP2 are based on the older 1985 Highway Capacity Manual (HCM) methodology, therefore, should only be used for ballpark estimations. Only software based on the current HCM shall be used for traffic analyses.
- SIGCAP2 Users Manual
- Signal Progression Calculator
Signal Progression Calculator - The Signal Progression Calculator is an Excel spreadsheet intended for use in project development as a preliminary estimate of bandwidth adequacy. 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 (APM).
- Synchro/SimTraffic Version 7
Synchro.SimTraffic.Templates.zip - The Synchro/SimTraffic Template Files were created as a tool to both save time and reduce errors when starting Synchro analysis. This is only a starting point, as there are numerous other changes that need to be made on a case by case basis. All parameters are set following ODOT’s Synchro/SimTraffic settings provided in the Analysis Procedures Manual (APM) Chapters 7 and 8. The parameters that were updated reflect only those that are global (apply to the network as a whole). 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.
The Trucksum Spreadsheet is used to process ODOT-counted 12-hour or greater counts. These counts are provided in electronic form in "Trucksum" format from the Transportation Systems Monitoring Unit. For information on how to use this spreadsheet, see Chapter 11 of the Analysis Procedures Manual (APM).
Unsignalized Intersection Tools
- Preliminary Traffic Signal Warrants
Preliminary Traffic Signal Warrant Analysis Form (Excel calculator version) - 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 (APM).
- Roundabout Calculator
Roundabout Calculator - ODOT roundabout capacity analysis will employ the NCHRP Report 572 method. To expedite analysis, spreadsheets have been developed. The roundabout calculator spreadsheet inputs: entry volume, truck percentage, truck equivalent, Peak Hour Factor, and heavy vehicle factor for each approach. With these inputs, the roundabout calculator spreadsheet produces conflict flow volumes, entry capacity, v/c ratio, control delay, Level Of Service, and the 95th percentile queue for each approach. The Analysis Procedures Manual describes ODOT’s adopted analysis of roundabouts and explains the roundabout spreadsheets with examples. There is a read page and four other spreadsheets. The spreadsheets are in the order of design progression: single lane roundabout, bypass lane (if there is a heavy right turn volume), multilane roundabout, and bypass lane for a multilane roundabout.
- UNSIG (Not compatible with Windows 7)
UNSIG - UNSIGnalized Intersection Analysis Program (Windows self-extracting zip file) This is the latest version of UNSIG10 (18 October 1988). It is an un-signalized intersection capacity analysis program designed to essentially duplicate the procedures from the Transportation Research Board 1985 Highway Capacity Manual.
UNSIG10 is based on the older 1985 Highway Capacity Manual (HCM) methodology, therefore, should only be used for ballpark estimations. Only software based on the current HCM shall be used for traffic analyses. UNSIG 10 User's Guide.
Disclaimer and Limitation of Liability
Software and manuals are distributed "as is" without warranty of any kind, either expressed or implied, including, but not limited to the implied warranties of merchantability and fitness for a particular purpose. The entire risk as to the quality and performance of this program is with you. You are advised to test the program thoroughly before you rely on it. Should the program prove defective, you (and not the Oregon Department of Transportation or the State of Oregon) assume the entire cost of all necessary servicing, repair or correction. Any liability of seller or manufacturer of this software will be limited exclusively to product replacement.
LIMITATION OF LIABILITY
In no event shall either party be liable for any direct, indirect, incidental, special or consequential damages, or damages for loss of profits, revenue, data or use, incurred by either party or any third party, whether in an action in contract or tort, even if the party has been advised of the possibility of such damages. The Oregon Department of Transportation’s liability for damages hereunder shall in no even exceed the amount of fees, if any, you paid under this agreement, and if such damages result from your use of the program, such liability shall be limited to fees paid for the program.