Transportation

Air Quality & Environment

The region has come a long way in addressing its air quality and other environmental challenges. But additional work remains in order to protect public health, sensitive ecosystems, and expensive infrastructure from the effects of air and water pollution and climate change.

To address these concerns, the TPB regularly forecasts future vehicle-related emissions of several common air pollutants and coordinates efforts to keep those emissions below approved regional limits. Through its regional Green Streets Policy, the TPB is promoting and coordinating approaches to roadway design that mitigate runoff after heavy rains, which can pollute and damage local waterways. And together, COG and the TPB are working to identify strategies to reduce greenhouse gas emissions and ways to adapt to the effects of climate change that are already underway or seen as inevitable.

News & Multimedia

  • V2050_logo_for_post_blue
    News

    Visualize 2050 public comment period open October 23-November 21, 2025

    October 23, 2025

    The National Capital Region Transportation Planning Board (TPB) is accepting public comment on the draft Visualize 2050 plan, draft FY 2026-2029 Transportation...

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    News

    TPB elects Fairfax County Supervisor Walter Alcorn as new Chair

    October 15, 2025

    The National Capital Region Transportation Planning Board (TPB) elected Walter Alcorn as new TPB chair on October 15, 2025.

  • Omniride_I66_Express_mobility_partners_640
    News

    TPB sets schedule for final steps of Visualize 2050 plan review and approval

    July 28, 2025

    The National Capital Region Transportation Planning Board (TPB) has announced the final schedule for development, review, and approval of the Visualize 2050...

  • flooding
    News

    New TPB flood analysis shows more regional assets vulnerable

    July 18, 2025

    The National Capital Region Transportation Planning Board (TPB) is working to strengthen the region’s transportation system against flooding and impacts of...

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    News

    Fall 2024 TPB Highlights

    November 29, 2024

    The TPB met on September 18, October 16, and November 20, 2024. Key agenda items included briefs on EV infrastructure implementation, the Regional Air Passenger...

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