Across the United States, lack of public transit and active transportation options force Americans into car ownership. Even in major urban areas, transit demand can exceed transit supply, resulting in ‘transit deserts’, where residents cannot easily access transit routes. The Urban Information Lab at the University of Texas estimates that in the San Francisco Bay Area, 13.52% of residents live in these transit deserts. Transit deserts have arisen due to a number of factors, including historical focus on transit for commuting purposes, suburban sprawl, and institutionalized racism within transportation planning. Residents in these areas not only face increased transportation costs through automobile usage, but also can lack access to employment, fresh food, clean air, and quality health care. This further perpetuates issues with transportation equity and mobility for all residents. This project works to map transit deserts in the San Francisco Bay Area, explain the historical transportation planning that led to these deserts, and discuss the implications of low transit supply.