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Microscale and Regional Modeling and Emission Models

Below are abstracts for products produced by or for the Federal Highway Administration. As electronic versions become available, links will be made so that you may download them. For products not available in this manner, please contact the party listed for that abstract.


Regional Modeling

Compliance with Nitrogen Oxides of the Transportation Conformity Rule

Abstract: This paper was developed to advise field staff and others involved in nitrogen oxide (NOx) modeling. It consists of two parts, the first being a memo discussing the background factors affecting NOx pollution levels including variables such as vehicle speed and the percentage of diesel vehicles in the traffic. The second part describes certain modeling actions that can be taken to more accurately estimate the NOx levels based on the experience gained in efforts with various State DOTs and MPOs.

Author: FHWA (Office of Environment and Planning, Air Quality Technical Team)
Publication Year: 1994

Contact: The Office of Natural and Human Environment at environment@fhwa.dot.gov.

A Manual of Regional Transportation Modeling Practice for Air Quality Analysis

Abstract: The manual was developed under the auspices of the Clean Air Project of the National Association of Regional Councils (NARC). A conference was held in Crystal City, Virginia in November of 1991, and nearly 100 regional, state, and federal transportation planning officials attended. This conference provided the opportunity for participants to set the direction for the development of the manual. The manual was developed for the purpose of providing guidance on CAA issues to consider in responding to new regional analysis needs, and especially for carrying out transportation modeling for air quality planning efforts. The manual reviews the current state of practice today and focuses primarily on travel demand forecasting as it is practiced by regional agencies-MPOs. It identifies and discusses modeling and analysis requirements resulting from the CAA and ISTEA, and suggests strategies for responding to specific analysis needs and for overcoming common problems. Further research needs are identified within the manual for purposes of research and development.

Author: Deakin, Harvey, and Skabardonis (DHS) and Cambridge Systematics
Supporting Organization: National Association of Regional Councils (NARC)
Publication Year: 1993

The MOBILE Model and Transportation Planning: A Brief Overview

Abstract: This is a simplified summary of the MOBILE model and how it is used in transportation planning. The booklet was developed for distribution to nontechnical audiences that work with the transportation field and use the results of the MOBILE model.

Author: Volpe National Transportation Systems Center
Supporting Organization: FHWA (Office of Environment and Planning, Air Quality Technical Team)
Publication Year: 1995

Contact: The Office of Natural and Human Environment at environment@fhwa.dot.gov.

Qualitative Assessment of IVHS Emission and Air Quality Impacts

Abstract: This report describes IVHS programs' contribution to air quality. It outlines the current debate on IVHS's role in reducing congestion versus the argument that increasing capacity will induce more travel and off-setting any gains made in reducing traffic congestion and emissions. The report also discusses strategies designed to reduce emissions by encouraging mode shifts, and plans designed to reduce pollution such as inspection and maintenance programs.

Author: Jack Faucett Associates
Supporting Organization: FHWA (Office of Environment and Planning, Air Quality Technical Team)
Publication Year: 1993

Contact: The Office of Natural and Human Environment at environment@fhwa.dot.gov.


Microscale Modeling and Emissions Models

Evaluation of the MOBILE Vehicle Emission Model

Abstract: EPA's MOBILE5 model is used to estimate emissions from on-road motor vehicles. MOBILE5 represents the most recent version of this program which has undergone continuous revision in attempts to estimate mobile source emission trends since its development in the late 70s. Modifications have been made to the MOBILE model structure in attempts to account for technical and policy changes including I&M programs, reformulated gasoline and oxyfuel programs, and other initiatives. Comparisons are made between the assumptions used in MOBILE5, MOBILE4.1, MOBILE 4, and emission rate projections.

Author: Sierra Research, Inc.
Supporting Organization: FHWA (Office of Environment and Planning, Air Quality Technical Team)
Publication Year: 1994

Particulate Matter Guidance Document

Abstract: This paper was developed to advise field staff and others involved in particulate matter (PM-10) issues on the state of the knowledge in this area. It discusses the PM standard, PM sources, and the classification of geographic areas into attainment and nonattainment areas. Some general information is discussed about modeling using the PART5 emission factor model. Conformity issues, SIPs requirements, and further revisions of the PM-10 NAAQS are also discussed.

Author: Jay Turner
Supporting Organization: FHWA (Office of Environment and Planning, Air Quality Technical Team)
Publication Year: 1995

Contact: The Office of Natural and Human Environment at environment@fhwa.dot.gov.

A Sensitivity Evaluation of CAL3QHC Dispersion Model for Carbon Monoxide Analysis at Urban Intersections

Abstract: This paper was developed to evaluate the implications of EPA's proposed improvements to the current CAL3QHC model used to determine emission concentrations at intersections. It evaluates several variable used in the program by performing statistical analysis methods to find which variables had strong correlations to influencing the results of the model.

Author: Julie Lindeman
Supporting Organization: FHWA (Office of Environment and Planning, Air Quality Technical Team)
Publication Year: 1994

Contact: The Office of Natural and Human Environment at environment@fhwa.dot.gov.

Updated: 05/22/2012
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