Planning and politics collide in the struggle to redesign Brooklyn’s notoriously dangerous McGuinness Blvd.

When a beloved teacher is tragically killed in a hit-and-run crash in Greenpoint, Brooklyn, a grassroots movement emerges to transform a notoriously dangerous four-lane boulevard into a safer, two-lane street with protected bike lanes. While many applaud the proposed road diet, it also sparks a backlash — led in part by a powerful local business owner. As government support begins to waver, neighbors unite to challenge entrenched interests and fight for a safer Greenpoint.

The film situates this local struggle within broader historical, environmental, political, and social contexts through interviews with politicians, activists, urban planners, entrepreneurs, and cultural icons including David Byrne and Janette Sadik-Khan. Changing Lanes makes a compelling call to action for democracy at street level.