MOBILE5

MOBILE5 Highway Emissions Modeling

BREEZE MOBILE5, a model that calculates vehicle emissions factors for use in mobile source dispersion models, such as CAL3QHC, CAL3QHCR, and CALINE4. MOBILE5 calculates projected, future-year emission factors for hydrocarbon (HC), carbon monoxide (CO), and oxides of nitrogen (NOx). In addition, it can handle complex inspection and maintenance (I/M) program design. The package is based upon the US EPA? s DOS-based MOBILE5 emission factor model and offers the rich features and functionality of the BREEZE Windows interface.

MOBILE5 calculates emission factors for eight individual vehicle types in low- and high-altitude regions. Vehicle types include:

Gasoline-fueled light-duty vehicles (LDGVs)
Gasoline-fueled light-duty trucks (LDGTs)
Gasoline-fueled heavy-duty trucks (HDGVs)
Gasoline-fueled motorcycles
Diesel-fueled light-duty vehicles (LDDVs)
Diesel-fueled light-duty trucks (LDDTs)
Diesel-fueled heavy-duty trucks (HDDVs)

The calculated emission factors depend on various conditions such as ambient temperature, average vehicle travel speed, operating modes, fuel volatility, and mileage accrual rates. Many of the variables affecting vehicle emissions can be specified directly by the user. The model will estimate emission factors for any calendar year between 1960 and 2020, inclusive. The 25 most recent model years are considered to be in operation in each calendar year.

This version of MOBILE5 also includes the following functionality and features:

California Low-Emitting Vehicle (LEV) Program... includes the ability to model the effects of an area opting in to the California LEV program.
Inspection and Maintenance (I/M) Programs... has the capability of modeling the impact of one or two I/M programs on reducing calculated emission factors.
Anti-tampering Programs (ATP)... allows for the use of anti-tampering programs to reduce the frequency and resulting emission impact from emission control tampering (e.g., misfueling, removal or disablement of catalytic converters, etc.).
Period 1 and Period 2 Reid Vapor Pressure (RVP) Values... provides the ability to model the effects of an RVP control program during summer ozone-season months in 1989-1991 (Phase I volatility control) and 1992 and later (Phase II volatility control).
Refueling Emissions... allows for the impacts of the implementation of "at the pump" (Stage II) and "onboard" (on the vehicle) vapor recovery systems (VRS) to be modeled.

John Tatom 256.327.3392
jtatom@apt-research.com

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