Comparing Air Quality: A Study of Vehicle Pollution in San Fernando Valley

Project Summary

An AP Physics student conducted research comparing particulate matter levels between high-traffic areas and natural spaces in San Fernando Valley, demonstrating how vehicle emissions contribute to the region’s smog problem and proposing solutions focused on walkable neighborhoods and updated vehicle regulations.

Detailed Story

Sayuri, an AP Physics student, investigated San Fernando Valley’s smog problem by comparing particulate matter levels between a natural hiking trail and a busy parking lot near a main road, gas stations, and a semi-truck area. Using a WeatherFlow-Tempest Air Quality Device to measure temperature, PM1, PM2.5, PM10, and relative humidity, the study found almost no particle pollution at the hiking trail, while the parking lot showed elevated levels of all measured particulates. The research identified vehicle emissions as a significant contributor to smog formation in the valley, which is exacerbated by the region’s warm temperatures, geography, and car-dependent culture. After analyzing the data and researching vehicle emissions, Sayuri proposed two main solutions: creating walkable, accessible neighborhoods with safe sidewalks and shorter distances between homes and businesses to reduce car dependency, and updating government regulations on mobile source pollution, which have not been significantly revised since 2007 despite the increasing number of drivers. The project emphasized that infrastructure changes could not only improve air quality but also reduce traffic congestion, decrease accidents, promote healthier lifestyles, and address transportation inequity.

Impact Statement

Demonstrated the direct relationship between vehicle traffic and particulate matter pollution, providing quantitative evidence of how transportation choices affect local air quality and developing recommendations for both infrastructure and policy changes to address the San Fernando Valley’s smog problem.