Road pricing and neighborhood air quality in Washington, DC

Transportation, air quality, and health: a community-centered study of road pricing in Washington, DC.

NIH-funded research George Washington University · NIH-11194295

This project looks at how charging drivers to enter parts of Washington, DC could change air pollution and health for people living and working in affected neighborhoods.

Quick facts

Grant typeNIH-funded research
Study typeNIH-funded research
Funding institutionGeorge Washington University NIH-funded
Lab location1 site (Washington, United States)
Project IDNIH-11194295 on NIH RePORTER

What this research studies

Researchers are working with community partners in Washington, DC to compare different ways of charging drivers for road use and how those choices change traffic and neighborhood air pollution. They will combine air monitors, traffic and big data, health records, and community input to model changes in NO2, PM2.5, and related asthma and premature death risks at the neighborhood level. The team will map who gains cleaner air and who might see pollution shift to other neighborhoods, and use those results to recommend pricing designs that protect vulnerable residents. Community members will help choose scenarios and interpret results so local concerns guide the work.

Who could benefit from this research

Good fit: Ideal participants are people who live, work, or spend significant time in Washington, DC neighborhoods near busy roads, especially people with asthma or other breathing problems.

Not a fit: People who do not live in or near the District of Columbia or whose exposures come mainly from indoor or non-traffic sources may not see direct benefits from this work.

Why it matters

Potential benefit: If successful, the project could show which road pricing approaches reduce pollution and asthma cases in DC neighborhoods.

How similar studies have performed: Other cities that used congestion or road pricing (for example London and Stockholm) reduced traffic and local pollution, but clear neighborhood-level health benefits are less well documented.

Where this research is happening

Washington, United States

Researchers

About this research

  1. This is an active NIH-funded research project — typically early-stage science, not a clinical trial accepting patient enrollment.
  2. Some NIH-funded labs run parallel clinical studies or seek volunteers for related work. To check, contact the principal investigator or institution listed above.
  3. For full project details, budget, and progress reports, visit the official NIH RePORTER page below.
Last reviewed 2026-06-13 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.