Skip to main content
U.S. flag

An official website of the United States government

Here’s how you know

Dot gov

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

HTTPS

Secure .gov websites use HTTPS
A lock (LockA locked padlock) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

    • Environmental Topics
    • Air
    • Bed Bugs
    • Cancer
    • Chemicals, Toxics, and Pesticide
    • Emergency Response
    • Environmental Information by Location
    • Health
    • Land, Waste, and Cleanup
    • Lead
    • Mold
    • Radon
    • Research
    • Science Topics
    • Water Topics
    • A-Z Topic Index
    • Laws & Regulations
    • By Business Sector
    • By Topic
    • Compliance
    • Enforcement
    • Laws and Executive Orders
    • Regulations
    • Report a Violation
    • Environmental Violations
    • Fraud, Waste or Abuse
    • About EPA
    • Our Mission and What We Do
    • Headquarters Offices
    • Regional Offices
    • Labs and Research Centers
    • Planning, Budget, and Results
    • Organization Chart
    • EPA History

Breadcrumb

  1. Home
  2. Clean Air Act Advisory Committee (CAAAC)

The Future of Mobility, Final Report to the Clean Air Act Advisory Committee, February 2022

Approved for submittal to EPA by the Clean Air Act Advisory Committee, February 2022.

From September 2019 until June 2021, the Mobile Sources Technical Review Subcommittee (MSTRS) met regularly to develop a series of insights and recommendations that sought to address the impact of a wide array of new technologies, fuels, and transportation trends on the air pollution, climate, and other environmental impacts of the transportation sector. The 35 members of the MSTRS self-selected into one of four work groups that explored a series of questions that were designed to consider a range of future mobility paradigms in each of the following four categories: Vehicle Technology, Fuels, Personal Mobility, and Goods Movement. These meetings and discussions, along with additional research and analysis throughout the process, enabled the Subcommittee’s members from state, local, and regional government, the automotive and related industries, fuel and energy companies, environmental and other public interest organizations, and academia to develop the work presented in the Future of Mobility report. The Future of Mobility report compiles and summarizes the research, analysis, discussions, and recommendations of the four work groups. The MSTRS chair provided a presentation to the Clean Air Act Advisory Committee (CAAAC) in December 2021 that summarizes the information and recommendations in this report. In February 2022 the CAAAC voted to adopt the report and present it to EPA.

The Future of Mobility, Final Report to the Clean Air Act Advisory Committee, February 2022 (pdf) (11.27 MB)

Clean Air Act Advisory Committee (CAAAC)

  • Learn about the CAAAC
  • Meetings
  • Reports
  • Subcommittees and workgroups
  • Clean Air Excellence Awards
Contact Us About the Clean Air Act Advisory Committee (CAAAC)
Contact Us to ask a question, provide feedback, or report a problem.
Last updated on April 24, 2025
  • Assistance
  • Spanish
  • Arabic
  • Chinese (simplified)
  • Chinese (traditional)
  • French
  • Haitian Creole
  • Korean
  • Portuguese
  • Russian
  • Tagalog
  • Vietnamese
United States Environmental Protection Agency

Discover.

  • Accessibility Statement
  • Budget & Performance
  • Contracting
  • EPA www Web Snapshot
  • Grants
  • No FEAR Act Data
  • Plain Writing
  • Privacy
  • Privacy and Security Notice

Connect.

  • Data
  • Inspector General
  • Jobs
  • Newsroom
  • Regulations.gov
  • Subscribe
  • USA.gov
  • White House

Ask.

  • Contact EPA
  • EPA Disclaimers
  • Hotlines
  • FOIA Requests
  • Frequent Questions
  • Site Feedback

Follow.