MOBILE6 Vehicle Emission Modeling Software

This web site provides the MOBILE6 Vehicle Emission Modeling Software and related presentations and training resources.  MOBILE6 is an emission factor model for predicting gram per mile emissions of Hydrocarbons (HC), Carbon Monoxide (CO), Nitrogen Oxides (NOx), Carbon Dioxide (CO2), Particulate Matter (PM), and toxics from cars, trucks, and motorcycles under various conditions.

For further information or assistance regarding this web page or MOBILE6:

• MOBILE Model Information Contact:  fax:  (734) 214-4939 or email:  mobile@epa.gov
• EPA-MOBILENEWS Listserver:  Full description and subscription information 2K TXT

About PDF Files

MOBILE6 Model

• MOBILE62.ZIP -- This zipped file allows users to download the MOBILE6.2 model, including HC, CO, NOx, PM air toxics, user guide, supporting documentation, a "frequently asked questions" list, source code, and sample input and output files.  The file can be unzipped with standard software such as WinZip.  A "read-me" file explains the next steps for setting upand using the model. (November 2003) 3M ZIP
  
  

• MOBILE6 User Guide -- This guide (also in MOBILE62.ZIP) provides detailed instructions for setting up and running MOBILE6 emission scenarios.  (EPA420-R-03-010, August 2003) 846K PDF or 276K ZIP WPD

• MOBILE6.2 Policy Guidance -- This guidance clarifies how and when the current version of MOBILE6.2 can be used for SIPs and conformity purposes. (February 24, 2004) 672K PDF

• Federal Register Notice of Availability:  Official Release of MOBILE6.2 Motor Vehicle Emissions Factor Model, published May 19, 2004.  HTML or 45K PDF
  
  
• Policy Guidance on when MOBILE6 must be used for State Implementation Plans and Conformity -- This document lists questions and answers on how and when to use MOBILE6 in SIP development and transportation conformity decisions.  105K PDF
  • Clarification of Policy Guidance for MOBILE6 SIPs in Mid-Course Review Areas.  112K PDF
    
    
• Technical Guidance on the Use of MOBILE6.2 for Emission Inventory Preparation -- This document provides EPA guidance on appropriate input assumptions and sources of data for the use of MOBILE6.2 in SIP and conformity related submissions.
  
  • Cover Memo   43K PDF
  • Technical Guidance (EPA420-R-04-013, August 2004):  358K PDF
  • Diesel sulfur levels by county (see section 5.5 of the Technical Guidance document, above.)  1.3M PDF
  
  
• Technical Description of the Toxics Module for MOBILE6.2 and Guidance on Its Use for Emission Inventory Preparation - This document describes the methodology used to estimate air toxic emission rates in the toxics module for MOBILE6.2, describes the sources of data used, and provides users with guidance on how to obtain data required as input parameters for the model.  The document also compares some MOBILE6.2 results to results using a previous highway mobile source toxics emission factor model, MOBTOX5b.
  • Technical Guidance (EPA420-R-029):  589K PDF or 235K  ZIP WPD and XLS
    
  • Workbook for making MOBILE6.2 and MOBTOX5b comparisons by vehicle class and model year: 4.2M ZIP XLS

• Sensitivity Analysis of MOBILE6.0 -- This report presents a systematic study of the relative importance of various MOBILE6 input parameters. (EPA420-R-02-035, December 2002): 1.3M PDF or 2M DOC

• Frequently Asked Questions -- This document (an October 2003 version is also in MOBILE62.ZIP) lists questions from MOBILE6 users and answers from EPA staff.  140K PDF or 128K ZIP WPD
  
  
• Excel spreadsheet and Windows program to calculate the humidity ratio in grains of water per pound of dry air using relative humidity, barometric pressure, and ambient temperature as input. (February 2002)  16K XLS
  
  
• Federal Register Notice of Availability:  Official Release of the MOBILE6 Motor Vehicle Emissions Factor Model, published January 29, 2002.  HTML or 48K PDF

MOBILE6 Presentations:

• MOBILE6 Presentations, April 4, 2001, North American Motor Vehicle Emissions Control Conference (NAMVECC), Atlanta.
  • Overview and Comparison to MOBILE5 113K PDF
  • Input/Modeling Guidance and SIP/Conformity Policy 19K PDF or 45K PPT
    
    
• MOBILE6 Presentation, March 26, 2001, Coordinating Research Council On-Road Vehicle Emissions Workshop, San Diego. 106K PDF
  
  
• MOBILE6 Presentation, March 27, 2000, Coordinating Research Council On-Road Vehicle Emissions Workshop, San Diego. 110K PDF or 280K PPT
  
  
• MOBILE6 Presentation, December 9, 1998, Air and Waste Management Association meeting, New Orleans
  • Slides 38K PDF or 55K PPT
  • Paper 57K TXT or 70K PDF or 70K WPD

MOBILE6 Training
EPA is developing a variety of training opportunities for MOBILE6 users.  Information on this training will be posted as available.  Also see the MOBILE6 user guide above.

• 5-Day Training presented in Seattle, September 2001
  • ReadMe 2K TXT
  • 195 page PowerPoint presentation given on the first day of the course. 2.4M PDF or 6.9M PPT
    This is a basic introduction to on-road emissions modeling and MOBILE6. It can serve as a stand-alone class for managers and others who will not perform analyses using the model.
  • Training Manual for the five day course:
    • Day 1 1.3M PDF 
    • Day 2 255K PDF 
    • Day 3 780K PDF
    • Day 4 275K PDF 
    • Day 5 300K PDF
  • During the second through fifth days of the training, numerous examples were worked in class. The examples are given in the training manual. The solutions to those examples are given in these four files:
    • Day 2 260K PDF 
    • Day 3 160K PDF 
    • Day 4 250K PDF 
    • Day 5 90K PDF
      
      
• Computer-based training 1.9M ZIP.
  After unzipping, please see the "ReadmeCD.txt" file for instructions.
  
  
• Third-Party MOBILE6 Model Training HTML

Comments and questions should be sent by email to mobile@epa.gov. Please make sure to include your name and organizational affiliation on any comments.

Technical Background

Workshop Documents

Main EPA Office of Transportation and Air Quality Modeling Page