Why American Towns Are Replacing Intersections With Roundabouts

Every day in the United States, red-light running kills two people, a grim statistic rooted in the violent ninety-degree geometry of traditional traffic-light intersections. This documentary explores why a growing number of American towns are abandoning that design in favor of roundabouts, a solution proven safer by decades of data from Europe and now confirmed across the United States. We trace the surprising history: from the chaotic high-speed traffic circles of the early 1900s, to the rise of the traffic signal in 1914 Cleveland, to Britain's reinvention of the modern low-speed roundabout in the 1960s. The story centers on Carmel, Indiana, where Mayor Jim Brainard quietly built the town's first roundabouts by calling them a 'landscaping project.' Today Carmel has more than 160 roundabouts and an 80 percent drop in injury crashes. Nationwide, studies show roundabouts cut fatal crashes by roughly 90 percent, with 2021 federal legislation finally funding wider adoption. Have you ever driven through an intersection and felt that flash of tension wondering if someone might run the light? Share your experience in the comments. If you enjoy exploring the infrastructure that shapes everyday life, Like this video, Subscribe to Professor Savvy, and consider supporting the channel through Super Thanks. #ProfessorSavvy #RoundaboutSafety #TrafficEngineering