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Analysis Procedures Manual

The Analysis Procedures Manual, or APM, provides the current methodologies, practices and procedures for conducting long term analysis of Oregon Department of Transportation plans and projects.

The APM does not establish any accepted or preferred software. Any analysis software is acceptable as long as it is consistent with the current APM and Highway Capacity Manual.

APM Version 2

Analysis Procedures Manual Version 2 - All Chapters - 19MB
(Last updated: 4/6/2023)

The APM file has been updated to include a clickable Table of Contents, a smaller overall file size, and is now viewable in most browsers for an easier reading experience. (It is still a large file and may take time to load.) 

You may also explore individual chapters below.

Cover (Last updated: 04/06/2023)

Acknowledgements​ (Last updated: 04/06/2023)

Preface​ (Last updated: 04/06/2023​)

Chapter 1 (Last updated: 07/19/2018)
Chapter 2 - Scoping Projects (Last updated: 05/17/2022)​​ Chapter 3 - Transportation System Inventory 
(Last updated: 06/08/2022) Chapter 4 - Safety (Last updated: 9/22/2019)

Chapter 5 - Developing Existing Year Volumes
(Last updated: 11/18/2022)​

Chapter 6 - Future Year Forecasting
(Last updated: 06/08/2022)

Chapter 7 - System Planning Analysis (Last updated: 03/16/2020)

Chapter 8 - Mesoscopic Analysis (Last updated: 07/19/2018) Chapter 9 - Transportation Analysis Performance Measures
(Last updated: 03/16/2020)
Chapter 10 - Analyzing Alternatives (Last updated: 06/08/2022) ​ ​ Chapter 11 - Segment and Facility Analysis
(Last updated: 02/19/2020)​​
Chapter 12 - Unsignalized Intersection Analysis​
(Last updated: 03/16/2020​)​​
Chapter 13 - Signalized Intersection Analysis​
(Last updated: 03/16/2020​)​​​

Chapter 14 - Multimodal Analysis (Last updated: 10/22/2020)

Chapter 15 - Traffic Simulation Models - Update in progress
(Last updated: 03/17/2020​)​​​
Chapter 16 - Environmental Traffic Data - Not yet complete Chapter 17 - Travel Demand Modeling (Last updated: 03/16/2020​)​​​ Chapter 18 - Operational Analysis (Last updated: 01/27/2020​)​​​​ Chapter 19 - Traffic Analysis Documentation - Not yet complete
(Last updated: 03/17/2020​)​​​​

Glossary (Last updated: 07/19/2018)​​​​

Abbreviations and Acronyms (Last updated: 01/19/2018​)​​​​​

The following reference papers and reports are provided for informational purposes only regarding how procedures were developed. Always use the latest version of the Analysis Procedure Manual, or APM, for current procedures.

The Analysis Procedures Manual User Group, or APMUG, is open to all interested parties either internal or external to ODOT. For information on APMUG, see the Analysis Procedures Manual User Group Guidelines. If you are interested in joining the group, contact  APM.

APMUG meetings are generally held quarterly, on the second Wednesday of January, April, July and October.

Related Technical Data

The Future Volume, ATR Characteristic and Seasonal Trend Tables contain traffic volume related data which is updated annually. This data is intended for use in developing existing and future volumes and described in the APM version 2, Chapters 5 and 6.

​The Future Highway Volume Table is created using data from the Transportation Volume Tables, or TVT, which are maintained by the Transportation Systems Monitoring Unit's Traffic Counting Program. For information on how to use this table, see Section 6.5 of the Analysis Procedures Manual.

Note: The future volumes are estimates only and local growth patterns and comprehensive plans may affect the actual outcome. The growth rates calculated from the Future Volumes Table are only a beginning point of estimating future volumes. Engineering judgment needs to be applied to the numbers.

​The Automatic Traffic Recorder, or ATR, Characteristic Table can be used to estimate seasonal traffic count adjustments. For information on how to use this table, see Section 5.4.2 of the Analysis Procedures Manual.

The ATR Characteristic Map is web based mapping tool that displays ATR’s based on their characteristic trend. Detailed information can be displayed on the map by clicking on ATR symbols. The ATR Characteristic Table and map are updated on a yearly basis, typically in September.

​The Seasonal Trend Table can also be used to estimate seasonal traffic count adjustments. The Seasonal Factor Table is updated on a yearly basis, typically in September. Season Trend Table factors are calculated using the previous full year of ATR data. For information on how to use this table, see Section 5.5.4 of the Analysis Procedures Manual.


Email APM
Telephone 503-991-9598


Auxiliary Lanes: Guidance on determining the portion of an auxiliary lane that functions as such versus a general-purpose lane is available in APM Appendix 10A.

The APM has been updated as of April 2023. Please see the 2023 change sheets for what has changed.

Next APM User Group Meeting

Date: Wednesday, April 12, 2023
Location: Microsoft Teams Meeting
Start time: 9:00 am
End time: 11:00 am (approximate)

Please submit any suggestions for agenda topics or presenters to
Email APM.