为什么自动化速度摄像机不成比例地影响黑色和棕色驱动程序

Cities across the country have used automated speed cameras in traffic enforcement for decades. 今天, nearly 200 communities have them in place. But critics say that in places like Chicago, the tickets and fines they generate fall disproportionately on Black and brown residents. Economics correspondent Paul Solman reports.

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