The following information covers OTAQ modeling and inventories.
Modeling is EPA's method for estimating emissions from on-road vehicles,
nonroad sources, and fuels. Inventories are calculations of total
emissions of a pollutant for a given area at a defined time and
set of conditions.
For further information or assistance regarding this web page,
contact:
ASD Information Line, phone: (734) 214-4636 or email: asdinfo@epa.gov
About Portable Document
Format Files
Geared toward the public, Mobile
Source Emissions - Past, Present, and Future provides general
information on the different air pollutants produced by mobile sources
and fuels, and of the various programs that OTAQ has undertaken
to control emissions of those pollutants, and the impact those programs
have had on emissions. It also links to the AIRData web site which
has air pollution data for both toxics and criteria pollutants for
the entire United States down to the county level.
MOBILE Model links
to information on the MOBILE vehicle emission factor model, which
is a software tool for predicting gram per mile emissions of hydrocarbons,
carbon monoxide, oxides of nitrogen, carbon dioxide, particulate
matter, and toxics from cars, trucks, and motorcycles under various
conditions.
NONROAD Model
links to information on the NONROAD emission inventory model, which
is a software tool for predicting emissions of hydrocarbons, carbon
monoxide, oxides of nitrogen, particulate matter, and sulfur dioxides
from small and large nonroad vehicles, equipment, and engines.
MOVES, or MOtor
Vehicle Emission Simulator, is an effort to develop
a new set of modeling tools for the estimation of emissions produced
by on-road and nonroad mobile sources. Also known as the "New Generation
Model," MOVES will encompass all pollutants (including hydrocarbons
[HC], Carbon Monoxide [CO], oxides of nitrogen [NOx], particulate
matter [PM], air toxics, and greenhouse gases) and all mobile sources
at the levels of resolution needed for the diverse applications
of the system.
Fuels Models
links to information on EPA's heavy-duty diesel fuel analysis program,
which seeks to quantify the air pollution emission effects of diesel
fuel parameters on various nonroad and highway heavy-duty diesel
engines. It also links to the Complex Model and the Simple Model
used for the Reformulated Gasoline Program.
Related Information:
Special Modeling
in Support of the Heavy Duty Engine/Vehicle and Highway Diesel Fuel
Final Rule
This web page provides support documentation and modeling procedures
for the Heavy Duty Engine/Vehicle and Highway Diesel Fuel Final
Rule. This page includes, but is not limited to, a modeled estimate
for one-hour concentrations of fine particulate matter, ground-level
ozone levels in extended time periods, PM emissions as they impact
national scale toxics, and diesel fuel requirement.
Special
Modeling in Support of the Tier 2/Gasoline Sulfur Final Rule
This web page provides information about special vehicle and engine
emission modeling completed in support of the Tier
2/Gasoline Sulfur Final Rulemaking. The modeling analyzed on-highway,
light-duty vehicles and trucks (all pollutants), heavy-duty gasoline
vehicles (NOx and VOC), heavy-duty vehicles (PM and SOx), nonroad
stationary, and other sources. Also, photochemical ozone modeling
and toxics modeling are provided.
Emission Inventories
This web site contains the document, "Procedure for Emission Inventory
Preparation - Volume IV: Mobile Sources" and several EPA papers
that describe the effects of raising speed limits on vehicle emissions.
Mobile Source Observation Database (MSOD)
CALINE Models
(e.g., CALINE3 & CALINE4)
Vehicle Clean Screening
This web page provides information on vehicle clean screening, vehicle
profiling, and remote sensing device issues. Clean Screening is
the term used to describe methods that states can use to excuse
cars from a scheduled Inspection and Maintenance emissions test.
Remote sensing is a way to measure pollutant levels in a vehicle's
exhaust while the vehicle is traveling down the road.
ftp Directory of emission
modeling files (e.g., MOBILE5a, PART5)
Mobile Source Present and Future Models Workshop
Ann Arbor, November 5-7, 2002:
A 3-day modeling workshop was held in Ann Arbor, MI, November 5
through 7, 2002. The first day of the workshop (November 5) was
devoted to the NONROAD model, the second day to the MOVES model,
and the third day to the MOBILE6 model.
- Workshop Presentations
- Workshop Daily Agendas (final version)
- NONROAD Session (November 5) [1K
TXT]
- MOVES Session (November 6) [1K
TXT]
- MOBILE6 Session (November 7) [2K
TXT]
- Workshop Announcement and Tentative Agenda [395K PDF]
Links to Related EPA Information:
Clearinghouse
for Inventories and Emissions Factors (CHIEF)
Emission Factor and Inventory Group, Office of Air Quality Planning
and Standards Latest emission factor and inventory information,
including AP-42 emission factor documents, inventory training tools,
emission estimation software, and emissions modeling tools.
Air Pollution
Emissions Overview
Office of Air Quality Planning and Standards Information on what
emissions are and where they come from, and on measuring, reporting,
and using emissions data.
Links to Related Non-EPA web Sites:
Mobile Source Emission
Inventory Program
California Environmental Protection Agency, California Air Resources
Board
This web site contains information on California's on-road and nonroad
mobile source emission factors for California and the motor vehicle
activity components such as vehicle-miles-traveled, starts and vehicle
population. It includes recent publications, the on-road model software
and associated system documentation and commonly requested outputs
from this model, known as "model runs."
Travel Model Improvement Program
U.S. Department of Transportation
The Travel Model Improvement Program (TMIP) is a multi-year, multi-agency
program to develop new travel demand modeling procedures that accurately
and reliably forecast travel for a broad range of modes, policy
actions and operational conditions. This web site has been established
to assure that practitioners have access to the best transportation
planning methods available.
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