Transportation conformity particulate matter hot-spot air quality modeling.
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2013-07-01
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Abstract:In light of the new development in particulate matter (PM) hot-spot regulations and Illinois Department
of Transportation (IDOT)’s National Environmental Policy Act (NEPA) documentation requirements,
this project is intended to (1) perform and demonstrate modeling of motor vehicle–generated PM in
Illinois’s PM2.5 nonattainment and maintenance areas [in IDOT Districts 1, 3, and 8 (northeastern
Illinois and Metro East)], (2) identify data needs and gaps in PM2.5 hot-spot modeling, (3) gain technical
insights into PM hot-spot modeling, and (4) understand uncertainties and limitations of PM hot-spot
modeling. Three required regulatory models are investigated: MOVES, the latest U. S. Environmental
Protection Agency mobile source emission model, and AERMOD and CAL3QHCR which are air
dispersion models authorized by the U.S. Environmental Protection Agency (U.S. EPA) for PM hot spot conformity analyses. For all three models, model inputs, parameters, model capability, model
performance, and output are investigated thoroughly through one pilot study and three case studies one highway project in the East St. Louis metropolitan area, and two arterial street-signal intersection
projects located in both Chicago and Metro East areas. Major findings of the modeling exercises,
modeling experience and insight, and recommendation for future work are discussed in the report.
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