Street-level air quality : exploring the feasibility of a cyclist-led, crowdsourced map in Singapore and Mexico

Abstract

This thesis explores the feasibility of creating a street-level air quality map, whereby cyclists gather data through a participatory sensing process as they ride around the city. I explore two primary areas required for the successful creation of such an initiative: the state of the technology for portable air quality monitors, and the likelihood of cyclist participation in gathering data. To test the technology, I conduct experiments in Singapore and Mexico City to determine whether a small, relatively inexpensive monitor can gauge variation in concentrations according to distance from traffic and route choice. I then survey cyclists in Singapore and Mexico, assessing level of interest in participating to gather air quality data, conceptions about local air quality, travel behavior, pollution health symptoms, and acceptable price point for a personal air quality monitor. If such a project were implemented, the data could serve planners and policy-makers in several fields, including transportation, public space, and public health. They could also be used as a powerful advocacy tool, as groups campaign for better cycling infrastructure and healthier cities. Citizens could use this air quality information to minimize their exposure when choosing their travel routes.