Practices for Project-Level Analyses for Air Quality

This report compiles and documents information regarding existing practices related to project-level air quality analysis by state departments of transportation (DOTs). Primary objectives of this research were to identify scoping practices and appropriately budgeting times and costs for consultant analyses by project type, pollutant, and level of public interest; which pollutants DOTs include in project-level analyses; and whether and when qualitative analyses are used where applicable, including indirect effects and cumulative impacts and greenhouse gases. Information in this study was collected through a literature review, a survey of DOTs, and follow-up interviews with selected agencies for the development of case examples. Six representative case examples were developed to describe assumptions, methodology, and lessons learned for relevant pollutants identified by DOTs.


  • English

Media Info

  • Media Type: Digital/other
  • Features: Appendices; Bibliography; Figures; Tables;
  • Pagination: 88p
  • Serial:
  • Publication flags:

    Open Access (libre)

Subject/Index Terms

Filing Info

  • Accession Number: 01784670
  • Record Type: Publication
  • ISBN: 9780309674317
  • Report/Paper Numbers: NCHRP Project 20-05, Topic 51-18
  • Files: TRIS, TRB, ATRI
  • Created Date: Oct 13 2021 9:30AM