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.
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