While upzoning is commonly implemented to accommodate growing urban populations by increasing housing density, its effects on traffic congestion are multifaceted and complex. On one hand, higher density can promote more efficient travel patterns, potentially alleviating congestion by enhancing the viability of public transit and non-motorized transportation modes. On the other hand, it can also lead to increased traffic volumes, exacerbating congestion. This study, focusing on the East New York Neighborhood in New York City, which underwent significant upzoning between 2016 and 2018, provides detailed insights into how upzoning influences local congestion dynamics. By employing regression models to analyze traffic data in relation to upzoning, clear distinctions emerged between treatment and control areas. The study suggests that effective urban planning should consider these dynamics to mitigate congestion, emphasizing the need for integrated approaches to address urban traffic challenges.