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NONROAD Model (nonroad engines, equipment, and vehicles)

The Final NONROAD Model is intended for Windows 95/98 and later. Its primary use is for estimation of air pollution inventories by professional mobile source modelers, such as state air quality officials and consultants.

For answers to specific questions on the NONROAD model, email the nonroad inventory model team at nonroad@epa.gov.

• Listserver Information
• Final NONROAD2005 Model
• Documentation: User Guide
• Documentation: Technical Reports
• Other EPA NONROAD Model Documentation
• Workshop Information
• Other Nonroad Reference Material
• Other EPA References
• Related Links
  

NOTE: You will need Adobe Acrobat Reader, available as a free download, to view some of the files on this page. See EPA's PDF page to learn more about PDF, and for a link to the free Acrobat Reader.

Listserver Information

• Subscription Instructions

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Final NONROAD2005 Model

(latest revision was June 2006)
• ReadMe File -- known issues and updates to NONROAD2005
• Frequently Asked Questions: Final NONROAD2005 Emission Inventory Model (PDF) (6 pp, 102K, EPA420-F-05-058)
• Overview & Full Installation Instructions - Please follow these instructions closely to install any NONROAD model files.
• NONROAD2005a Core Model and Data Files (2.9M ZIP)
• Graphic User Interface (GUI) full installation (3.9M ZIP) - includes all needed DLL/system files. After you have installed these files once, then you only need to update the GUI executable (nr-gui.exe), as updates become available. This installation includes the June 2006 version of nr-gui.exe (ver 2005.1.0).
• Graphic User Interface (GUI) (106K ZIP) - nr-gui.exe file only (version 2005.1.0), posted June 2006. If you have never installed the GUI on your current computer, you should use the full GUI installation above.
• Reporting Utility files: (download both of these)
  • Updated Reporting Utility version 2005c  (712K ZIP) - reports.mdb file only, Posted 3/27/2006.
  • Auxiliary database files (260K ZIP) - nrdata.mdb and multi-year post-processors, Posted 1/27/2006.
• MS-Access 2002 Runtime software (33M ZIP) - Needed to run Reporting Utility only if you do not already have a copy of Microsoft Access 2002(XP) or later.
• Diesel Fuel Sulfur Inputs by year - important for modeling PM and SO2 emissions.
• Fortran Source Code for Core Model (250K ZIP) - Optional, for reference only. Not needed to run model.

If you don't have unZIP software, here are some options. If you prefer to receive a CD that contains the non-ZIP'd model files, please email nonroad@epa.gov or fax 734-214-4939 with your request and mailing address.

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Documentation: User Guide

• User's Guide (PDF) (202 pp, 1.6MB, EPA420-R-05-013)

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Documentation: Technical Reports

These reports were updated in either December 2005 or April 2004 and supersedes prior versions.

• Temperature Corrections for Nonroad Exhaust Emissions, NR-001c (PDF) (4 pp, 33K, EPA420-R-05-014, December 2005)
• Conversion Factors for Hydrocarbon Emission Components, NR-002c (PDF) (6 pp, 55K, EPA420-R-05-015, December 2005)
• Exhaust Emission Effects of Fuel Sulfur and Oxygen on Gasoline Nonroad Engines, NR-003c (PDF) (8 pp, 111K, EPA420-R-05-016, December 2005)
• Seasonal and Monthly Activity Allocation Fractions for Nonroad Engine Emissions Modeling, NR-004c (PDF) (22 pp, 723K, EPA420-R-05-017, December 2005)
• Median Life, Annual Activity, and Load Factor Values for Nonroad engine Emissions Modeling, NR-005c (PDF) (46 pp 518K, EPA420-P-04-005, April 2004)
• Nonroad Engine Population Estimates, NR-006d (PDF) (46 pp, 1.1MB, EPA420-P-05-022, December 2005)
• Calculation of Age Distributions in the Nonroad Model -- Growth and Scrappage, NR-007c (PDF) (16 pp, 141K, EPA420-R-05-018, December 2005)
• Nonroad Engine Growth Estimates, NR-008c (PDF) (PDF, 13 pp, 208K, EPA420-P-04-008, April 2004)
• Exhaust and Crankcase Emission Factors for Nonroad Engine Modeling --Compression-Ignition, NR-009c (PDF) (135 pp, 599K, EPA420-P-04-009, April 2004)
• Exhaust Emission Factors for Nonroad Engine Modeling -- Spark-Ignition, NR-010e (PDF) (50 pp, 1.1MB, EPA420-R-05-019, December 2005)
• Nonroad Spark-Ignition Engine Emission Deterioration Factors, NR-011c (PDF) (16 pp, 127K, EPA420-R-05-023, December 2005)
• Nonroad Evaporative Emission Rates, NR-012c (PDF) (117 pp, 2.5MB, EPA420-R-05-020, December 2005)
• Refueling Emissions for Nonroad Engine Modeling, NR-013b (PDF) (8 pp, 151K, EPA420-P-04-013, April 2004)
• Geographic Allocation of Nonroad Engine Population Data to the State and County Level, NR-014d (PDF) (29 pp, 226K, EPA420-R-05-021, December 2005)
• Weekday and Weekend Day Temporal Allocation of Activity In The NONROAD Model, NR-015a (PDF) (7 pp, 154K, EPA420-P-04-015, April 2004)

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Other EPA NONROAD Model Documentation

• May 2006 15th International Emission Inventory Conference (New Orleans) -- NONROAD2005 Training
  • Presentation Slides (PDF) (220K) or 600K PPT
• April 2003 12th International Emission Inventory Conference (San Diego) -- NONROAD Paper
  • Paper: EPA's Newest Draft Nonroad Emission Inventory Model (PDF) (63K)
  • Presentation Slides (PDF) (283K) or 436K PPT
• Nonregulatory Nonroad Duty Cycles

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Workshop Information

• Nonroad Model Workshop #4, November 5, 2002: Ann Arbor: A 3-day modeling workshop was held in Ann Arbor, MI, November 5 through 7, 2002. Only the first day of the workshop (November 5) was devoted to NONROAD model. The second and third days were devoted to the MOVES model and MOBILE6 model, respectively.
  • Workshop Presentations
    • Presentations from the 1-day NONROAD Session
      A "zip" file containing the agenda and all of the presentations in either "PDF" formats [361K ZIP] or PowerPoint97 formats [246K ZIP]
    • Presentations for the 1-day MOVES Session
      A "zip" file containing the agenda and the presentations in "PDF" formats [1.3MB ZIP] as well as a transcript of that day's session.
    • Presentations for the 1-day MOBILE6 Session
      The MOBILE6 session consisted of five EPA presentations and a user forum in which three presentations were submitted by individual users.
      A "zip" file containing the agenda and all five of the EPA presentations in either "PDF" formats [1.4MB ZIP] or PowerPoint97 formats [2.7MB ZIP]
      A "zip" file containing the agenda and all three of the user submitted presentations in "PDF" formats [1.4MB ZIP]
  • Workshop Daily Agendas (final version)
    • NONROAD Session (November 5)
    • MOVES Session (November 6)
    • MOBILE6 Session (November 7)
  • Workshop Announcement and Tentative Agenda (PDF) (395K)

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Other Nonroad Reference Material

• Analysis of Commercial Marine Vessels Emissions and Fuel Consumption Data (PDF) (2.6MB, EPA420-R-00-002, posted Feb 10, 2000) or 4M MS-Word97
• Commercial Marine Activity in the United States - Final Reports (posted Sept 23, 1999)
  • Great Lake and Inland River Ports (PDF) (EPA420-R-99-019PDF, 360K)
  • Deep Sea Ports (PDF) (1.0MB, EPA420-R-99-020)
  • Both Reports in WordPerfect format and Tables as Excel5 spreadsheets (590K ZIP)
• Aviation emissions regulations & guidance (aircraft and ground support equipment)
• Voluntary Emission Reduction Program for Airport Ground Support Equipment
  (GSE Study and GSE Emissions Model)
• Archive for Previous Versions of the NONROAD Model and Documentation

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Other EPA References

• Emission Inventory Preparation
  • Procedures for Emission Inventory Preparation - Volume IV: Mobile Sources (from National Transportation Library of the US Dept of Transportation) (also available as a PDF file, 3.1MB, EPA420-92-009, used to be listed as EPA-450/4-81-026d revised)
• Estimating Commercial Marine Emission Inventories
  EPA's current marine inventory guidance document (Procedures for Emission Inventory Preparation, Volume IV: Mobile Sources, EPA420-R-92-009, December 1992) uses modeling techniques based on fuel consumption that were common at that time. Since then, we have developed new marine inventory techniques as part of our rulemaking process for emission standards for commercial marine diesel engines. These techniques are more similar to the techniques we use for mobile sources generally, and rely on emission factors, population estimates, and usage characteristics. We are currently using these techniques to update our marine inventories and to develop marine components for our MOVES model. This new work will provide the foundation for a new marine inventory guidance document, including more research into emission factors, population, and operating characteristics. Until this work is completed, states and other stakeholders are encouraged to refer to the inventories we prepared for our commercial marine diesel engine standards for use in developing their own inventories. Chapter 7 of the Final Regulatory Support Document (EPA420-R-03-004, January 2003) for EPA's 2003 rule, "Control of Emissions from New Compression-Ignition Engines at or Above 30 Liters per Cylinder", contains our inventory estimates and a description of how those estimates were produced for Category 3 commercial marine vessels. Chapter 5 of the Final Regulatory Impact Analysis (EPA420-R-99-026, November 1999) for EPA's 1999 rule, "Control of Emissions from Marine Diesel Engines", contains our inventory estimates and a description of how those estimates were produced for Category 1 and 2 commercial marine vessels.
  • Category 3 Marine Diesel Engines - Final Emission Standards Final Regulatory Support Document (PDF) (153 pp, 647K, EPA420-R-03-004, January 2003)
  • "Final Regulatory Impact Analysis: Control of Emissions from Marine Diesel Engines" (PDF) (132 pp, 966K, EPA420-R-99-026, November 1999)
• AP-42
  • Status of Work to Update AP-42 Nonroad Emission Factors
• November 1991: "Nonroad Engine and Vehicle Emission Study Report" (Publication no. EPA-21A-2001 or EPA460/3-91-002)
  • README about NEVES including hardcopy ordering information
  • Body of report (PDF) (1.8MB)
  • Appendices (PDF) (7.7MB)

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Related Links

• National Mobile Inventory Model (NMIM) - A free, desktop computer application developed by EPA to help you develop estimates of current and future emission inventories for on-road motor vehicles and nonroad equipment.
  
  
• CARB Mobile Source Emission Inventory Branch (California Air Resources Board)

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For further information or assistance regarding this web page, please contact the ASD Info Line at 734- 214-4636 or email: nonroad@epa.gov.

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