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# NONROAD Model (nonroad engines, equipment, and vehicles)

The NONROAD Model is intended for Windows 98 and la ter. Its primary use is for estimation of air pollution inventories by professional mobile source modelers, such as state air quality officials and consultants. NONROAD2008 updates NON ROAD2005 to include new nonroad emission standards promulgated in 2008 related to s mall gasoline engines and pleasure craft.

Listserver Information NONROAD2008a Model Documentation: User Guide Documentation: Technical Reports Other EPA NONROAD Model Documentation Other Nonroad Reference Material Related Links



### Listserver Information
Subscription Instructions



### NONROAD2008a Model
(posted July 2009) ReadMe File -- known issues and updates to NONROAD2008 Frequently Asked Questions: NONROAD2008 Emission Inventory Model (PDF) (5 pp, 190K, EPA420-F-09-021, April 2009) "EPA NONROAD Model Updates of 2008" International Emission Inventory Conference presentation of changes from NONROAD2005 (PDF) (29 pp, 100K, EPA420-F-09-020, April 2009) Overview & Full Installation Instructions - Please follow these instructions closely to install any NONROAD model f iles. NONROAD2008a Core Model and Data Files (ZIP) (3.0M) Graphic User Interface (GUI) full installation (ZIP) (3.9M) - includes nrgui.exe and all needed DLL/system files. If you already had the NONROAD2005 GUI installed on your s ystem, then you only need to update the GUI executable (in nrgui08.zip) provided below. Graphic User Interface (GUI) (ZIP) (110K) - nrgui08.zip (version 2008.1.0), posted April 2009. If you have never installed the GUI on your current computer, you should use the full GUI installation above. Reporting Utility files -- There are no updates for these from NONROAD2005. So if you have the NONROAD2005 versions, you do not need to download these. Otherwise, download both of these: Reporting Utility version 2005c (ZIP) (712K) - reports.mdb file only, Posted 3/27/2006. Auxiliary database files (ZIP) (260K) - nrdata.mdb and multi-year postprocessors, Posted 1/27/2006. MS

- Access 2002 Runtime software (ZIP) (33M) - Needed to run Reporting Utility only if you do not already have a copy of Microsoft Acce ss 2002(XP) or Access 2003. Suggested Nationwide Average Fuel Properties (PDF) (2 pp, 70K, EPA420-B-09-018, April 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. 

## Modeling and Inventories Last updated on Thursday, September 10, 2009 http://www.epa.gov/otaq/nonrdmdl.htm 

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- Suggested Diesel Fuel Sulfur Inputs and Gasoline E thanol content by year, important for modeling diesel PM and SO2 emissions as well as all gasoline engine emissions. Source Code (ZIP) (440K) Fortran source for Core Model and Visual Basic sour ce for GUI. Optional, for reference only. Not needed to ru n model.

If you don't have unZIP software, here are some opt ions . 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.



### Documentation: User Guide

This has not been updated for NONROAD2008. See the ReadMe or Frequently Asked Questions (PDF) (5 pp, 190K, EPA420-F-09-021, April 2009) document for additional information.

NONROAD2005 User's Guide (PDF) (202 pp, 1.6MB, EPA420-R-05-013)



### Documentation: Technical Reports

These reports were updated in either December 2005 or April 2004 and supersedes prior versions. They have not been updated for NONROAD200 8. See the ReadMe or Frequently Asked Questions (5 pp, 190K, EPA420-F-09-021, April 2009) document for additional information.

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 E missions 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 Co unty 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)



### Other EPA NONROAD Model Documentation
April 2009 18th International Emission Inventory Conference (Baltimore)

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3/15/2010 http://www.epa.gov/otaq/nonrdmdl.htmNONROAD2008 Poster Presentation EPA NONROAD Model Updates of 2008 (PDF) (28 pp, 100K, EPA420-F-09-020, April 2009) May 2006 15th International Emission Inventory Conf erence (New Orleans) - - NONROAD2005 Training Presentation Slides (PDF) (220K) or 600K PPT April 2003 12th International Emission Inventory Co nference (San Diego) -- NONROAD Paper Paper: EPA's Newest Draft Nonroad Emission Inventory Model (PDF) (63K) Presentation Slides (PDF) (283K) or 436K PPT Nonroad Model Workshop #4, November 5, 2002: Ann Ar bor: A 3-day modeling workshop was held in Ann Arbor, MI, November 5 thro ugh 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 MOBI LE6 model, respectively. Presentations from the 1-day NONROAD Session: A "zi p" file containing the agenda and all of the presentations in either "PDF" formats [361K ZIP ] or PowerPoint97 formats [246K ZIP ] Nonregulatory Nonroad Duty Cycles Archive of Previous Versions of the NONROAD Model and Documentation



### Other Nonroad Reference Material

Locomotive emissions regulations & guidance Emission Factors for Locomotives (PDF) (9 pp, 260K, April 2009, EPA420-F-09-025) Aviation emissions regulations & guidance (aircraft and ground suppor t equipment) Voluntary Emission Reduction Program for Airport Ground Support Equipment (GSE Study and GSE Emissions Model) Estimating Commercial Marine Emission Inventories EPA's 1992 marine inventory guidance document (Proc edures for Emission Inventory Preparation, Volume IV: Mobile Sources, EPA420-R-92 -009, December 1992) uses methodologies based on fuel consumption that were c ommon at that time. Since then, we have developed new marine inventory method ologies as part of our rulemaking process for emission standards for comme rcial marine diesel engines. These methodologies are more similar to what we use for mobile sources generally, and rely on emission factors, population estimates, and usage characteristics. These methodologies are described in an EPA report ("Curr ent Methodologies in Preparing Mobile Source Port-Related Emission Inventories," A pril 2009). We are currently using these methodologies to update our marine inventorie s. States and other stakeholders are encouraged to refer to the report and the inven tories we prepared for our commercial marine diesel engine standards for use i n developing their own inventories. Chapters 2 and 3 of the EPA report des cribe the methodologies for oceangoing vessels and harbor craft, respectively. Chapt er 3 of the Draft Regulatory Impact Analysis (EPA420-D-09-002, June 2009) for EPA's 200 9 proposed rule, "Control of Emissions from New Compression-Ignition Engines at or Above 30 Liters per Cylinder", contains our inventory estimates and a d escription of how those estimates were produced for Category 3 commercial marine vess els. Chapter 3 of the Final Regulatory Impact Analysis (EPA420-R-08-001a, May 2 008) for EPA's 2008 rule, "Control of Emissions of Air Pollution from Locomot ive Engines and Marine Compression Ignition Engines Less than 30 Liters Pe r Cylinder", contains our inventory estimates and a description of how those estimates were produced for Category 1 and 2 commercial marine vessels. Current Methodologies in Preparing Mobile Source Port

- Related Emission Inventories (PDF) (116 pp, 3MB, April 2009) Draft Regulatory Impact Analysis: Control of Emissions o f Air Pollution from Category 3 Marine Diesel Engines (PDF) (500 pp, 12.4MB, EPA420-D-09-002, June 2009) Final Regulatory Impact Analysis: Control of Emissions of Air Pollu tion from Locomotive Engines and Marine Compression Ignition Engines Le ss than 30 Liters Per Cylinder (PDF) (739 pp, 10MB, EPA420-R-08-001a, May 2008) Commercial Marine Activity in the United States

- Final Reports (posted Sept 

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3/15/2010 http://www.epa.gov/otaq/nonrdmdl.htm23, 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) Emission Inventory Preparation Procedures for Emission Inventory Preparation

- Volume IV: Mobile Sources (from National Transportation Library of the US Dep t of Transportation) (also available as a PDF file, 3.1MB, EPA420-92-009, used to be listed as E PA-450/4- 81-026d revised) AP-42: Status of Work to Update AP-42 Nonroad Emission Factors "Nonroad Engine and Vehicle Emission Study Report," November 1991 (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)



### Related Links
National Mobile Inventory Model (NMIM) - A free, desktop computer application developed by EPA to help you develop estimates of c urrent and future emission inventories for on-road motor vehicles and nonroad equipment.

CARB Mobile Source Emission Inventory Branch (California Air Resources Board)

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

. 

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