Black drivers were more likely to be pulled over by police than white drivers, according to a 2020 study of approximately 95 million traffic stops by 21 state police agencies and 35 municipal police departments between 2011 and 2018. The study by a team of 11 academics also found the disparity shrinks at night, when a motorist's race is harder to identify, suggesting race may play a role in who is stopped.

Source: Emma Pierson et al., “A large scale analysis of racial disparities in stops across the United States,” Nature Human Behavior, July 2020, p. 737,

Data for the graphic are as follows:

Officer Designation Number of White Drivers Stopped Number of Black Drivers Stopped
State Patrol 0.07 0.10
Municipal Police 0.14 0.20

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