Spatio-Temporal Analysis of the Roadside Transportation-Related Air Quality: Mobile Air Sensors in Transit Pilot Study

Californians in the San Joaquin Valley are disproportionately burdened by heavy traffic, and traffic-related emissions from vehicle exhaust are the primary source of air pollution for much of the State. For several decades, emissions from goods movement in the San Joaquin Valley have had detrimental health consequences for the low-income and minority communities adjacent to the truck depots, rail yards, and connecting highways. Despite the nation’s strict auto-emissions standards, Fresno ranks at the top for worst air quality, having the highest levels of particulate matter above federal and state clean air standards. There is an essential need to reduce the negative environmental and public health impacts associated with traffic and goods movement and ensure an equitable distribution of resultant benefits and burdens. The project seeks to address the public health and environmental impacts of vehicle emissions in the most affected communities and to characterize the less impacted areas in the communities for promoting active transportation. The changing air quality near roadways during people in transit may not be characterized in a timely manner because the Federal Reference Monitoring stations are sparsely located. Utilizing custom-built mobile air monitoring sensors in various transit modes within a community, the spatial and temporal variation of transportation-related air pollution can be captured more accurately. The research will focus on building integrated air pollution sensors and evaluation through a collocation approach and mobile monitoring.

Principal Investigator: 
Jaymin Kwon
PI Contact Information: 
April 2023 to March 2024
Impacts/Benefits of Implementation: 

The project's objective is to create safer communities and provide greater opportunities for active transportation modes such as biking and walking, increasing access to transit. Through research on spatio-temporal analyses of roadside transportation-related air quality, everybody can enjoy the accessibility of transit and choices of healthier transit to improve their quality of life. The study is to provide public information on transportation-related environmental exposure timely and relevant so that people can use the knowledge for decision-making of design and application of new materials and technologies to improve the public health of Californians. The project will further characterize the relationship of air quality between the federal reference monitoring data and local bike paths in the park and recreational areas, urban bike lanes for air quality, and on-road air quality by developing custom-built mobile air sensors.

Project Number: 



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