Details:

Creators:
Claggett, Michael ; Miller, Terrence A.
Claggett, Michael ; Miller, Terrence A. Less -
Corporate Creators:
Federal Highway Administration (U.S.)
Subject/TRT Terms:
[+]
Air Quality Emissions Reduction Evaluation Forecasting Project Management
Resource Type:
Tech Report
Geographical Coverage:
United States
Edition:
Final Report
Corporate Publisher:
Federal Highway Administration (U.S.)
Abstract:
With the final update to its on-road mobile source emission factor model, MOBILE6.2, the U.S. Environmental Protection Agency (EPA) added capabilities of predicting emission factors for a select number of mobile source air toxics (MSAT), commonly referred to as the six priority MSATs. These are acetaldehyde, acrolein, benzene, 1,3-butadiene, diesel particulate matter, and formaldehyde. This presentation describes a methodology for computing and evaluating emissions of MSATs among a group of transportation project alternatives. The suggested scale of analysis is the affected transportation network, defined as those links where the annual average daily traffic is expected to change by ± 5% or more as a result of the project. This analysis scale is considered reasonably representative of the regional scale emission factors predicted by MOBILE6.2. To gauge how emissions could change over an affected transportation network, provided are calculation ranges of MSAT emission factors produced by the model due to changes in a variety of input parameters. These include calendar year, ambient temperature, fuel Reid vapor pressure, and vehicle speed. Finally, a technique is presented for assessing MSAT emissions from the affected transportation network considering their relative toxicities. The technique allows a way to gauge the importance of increases and decreases in individual MSAT species amid proposed transportation alternatives and/or mitigation measures
Format:
PDF
Collection(s):
Federal Highway Administration
Main Document Checksum:
[+]
urn:sha256:90d67353873c9b14cc08d6574a77671a5d84f23988407ce389e328f19b86acb6
Download URL:
https://rosap.ntl.bts.gov/view/dot/53702/dot_53702_DS1.pdf
File Type:

Supporting Files

• msatemissions.pdf

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