Small Urban and Rural Areas
The transportation conformity regulations provide some flexibilities for small urban and rural areas in meeting the conformity requirements. The following documents research activities focusing on the conformity practices in small urban and isolated rural nonattainment and maintenance areas.
- Regional Emissions Analysis in Small Urban and Rural Areas (or PDF, 405 KB) (October 2004) - Prepared by ICF Consulting for FHWA, this report documents and assesses methodologies that can be used for estimating regional emissions for conformity analyses in small urban or rural areas. The report provides transportation practitioners a menu of methodologies and techniques for small urban or rural areas to consider for regional emissions analysis. The report also includes an assessment of these methodologies/techniques and highlights strengths and weaknesses of each.
- Transportation/Air Quality Issues in Rural Areas (April 2003) - Prepared by the Dye Management Group for FHWA, the purpose of this study was to increase understanding of how many rural areas are facing air quality issues and to identify the main causes for their exceeding air quality standards. The study focuses on transportation's contribution to the air quality problems in rural areas and how these areas are meeting certain Clean Air Act requirements related to motor vehicle emission sources.
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