The Analysis Procedures Manual (APM) provides the current methodologies, practices and procedures for conducting long term analysis of Oregon Department of Transportation (ODOT) plans and projects.
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. In addition, the calculator identifies when the reference population size is insufficient and therefore intersection crash rates must be compared to the statewide 90th percentile crash rates in APM Exhibit 4-1, and flags intersections with crash rates exceeding those values. For information on how to use this spreadsheet, see Chapter 4 of Analysis Procedures Manual (APM) Version 2.
- The Excess Proportion of Specific Crash Types calculator has been temporarily removed from the ODOT website due to an error discovered in one of the steps of the HSM procedure. The error is being worked on and a corrected version of the calculator will be posted when a solution has been identified.
Volume Development Tools
- 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 8
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.
Unsignalized Intersection Tools
- Heavy Vehicle Pavement Design Spreadsheet
The Heavy Vehicle Pavement Design Spreadsheet is used to calculate future heavy vehicle volumes for pavement design. The spreadsheet contains both scoping-level and project-level methods. See Chapter 6 of the APM for information on how to use this spreadsheet.
- TruckSum Spreadsheet
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).
- 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).
- Single Lane Roundabout Calculator
The Single Lane Roundabout Calculator employs HCM 2010 methodology. For each approach, the roundabout calculator produces conflict flow, entry flow, capacity, pedestrian impedance factor, v/c ratio, control delay, Level Of Service (LOS), and 95th percentile queue. Intersection delay and LOS are also calculated. Tabs are in order of use: notes, inputs, single lane, bypass lane, 2nd bypass lane, 3rd bypass lane, and 4th bypass lane. The Analysis Procedures Manual version 1 provides procedures for roundabout analysis in Chapter 7.
- 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.
- Queue Length Estimation at Two-Way STOP Controlled Intersection Calculator
The Two-Way STOP Controlled Intersection Calculator is an Excel spreadsheet 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 (APM).
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.
Land Use Models
Other Modeling Tools
- 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.
- Highway Economic Requirements System (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.
- 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.
- R Resources
Disclaimer and Limitation of Liability
Software and manuals are distributed "as is" without warranty of any kind, either express or implied, including, but not limited to the implied warranties of merchantability, fitness for a particular purpose, and non-infringement. 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.
LIMITATION OF LIABILITY
In no event shall the Oregon Department of Transportation be liable for any claim, damages or other liability whether direct, indirect, incidental, special or consequential damages, or damages for loss of profits, revenue, data or use, whether in an action in contract or tort, arising out of your use of the software or manuals.