The Pooled Fund effort was conducted from 2014 through 2019. Although work is completed, the website will remain available through 2020 to enable ongoing access and distribution of important work products. Note that items such as News Articles and Forum Posts are no longer active, and no further changes to website are planned. For additional information about the work completed by the Near-Road Air Quality Transportation Pooled Fund partnership, please contact Karin Landsberg at the Washington State Department of Transportation:

What is the Transportation Pooled Fund?

The Transportation Pooled Fund (TPF) was established by The Washington State Department of Transportation, the U.S. Federal Highway Administration (FHWA), and several state departments of transportation (DOTs), including those from Arizona, California, Texas, and Virginia, to help agencies identify and address a broad range of near-road issues. As stated in the initial TPF announcement:1

New federal regulations require state and local agencies to monitor near-roadway emissions and quantitatively assess potential for air quality impacts ("hot-spots"). State DOTs need to understand the implications of the new near-road data being collected; develop analysis methods and expertise to complete hot-spot modeling; and implement effective mitigation. Many states are unable to internally address all of the new emissions modeling and measurement requirements with existing resources. State DOTs need help meeting new near-road air quality analysis requirements and responding to stakeholder requests for information about near-road air pollution.

Currently, there is no forum dedicated to facilitating information and technology transfer related to near-road pollution issues. A pooled fund would allow for coordinated sharing of critical research developments, evaluation techniques, and study results to reduce overall costs and promote project delivery. It would provide a unique venue for collaboration between state DOTs and FHWA to clarify near-road emissions challenges, prioritize research needs, discourage redundant individual state efforts, and to quickly initiate research that develops solutions that meet the needs of multiple states.

Key motivators for the TPF include U.S. Environmental Protection Agency (EPA) requirements to quantitatively evaluate potential particulate matter (PM) hot-spots, EPA and FHWA requirements to assess mobile source air toxics (MSATs), and recently implemented EPA requirements to monitor air quality near heavily traveled roads. Sonoma Technology, Inc. (STI) was awarded a TPF support contract and is responsible for completing projects to meet TPF goals.


Mission Statement

The overall objective of the TPF is to improve the state of knowledge regarding, and the ability of state DOT staff to address, near-road air quality issues. Sub-objectives of the fund are to

  • Increase knowledge of the relationship between traffic conditions and monitored air quality data,
  • Improve best practices for project-level analyses,
  • Increase knowledge of operational and construction mitigation measures that support near-road air quality improvements, and
  • Improve interagency exchange of information.