Our research, published in June 2024, used data on the racial composition of drivers on every street in Chicago. We then compared who is driving on roads with who is being ticketed by the city’s speed cameras and who is being stopped by the Chicago police.
Our findings show that when speed cameras are doing the ticketing, the proportion of tickets issued to Black and white drivers aligns closely with their respective share of roadway users. With human enforcement, in contrast, police officers stop Black drivers at a rate that far outstrips their presence on the road.
For instance, on roads where half of drivers are Black, Black drivers receive approximately 54% of automated camera citations. However, they make up about 70% of police stops.
On roadways where half of the drivers are white, white drivers account for around half of automated citations – and less than 20% of police stops.
Driving while Black
Our research adds to other evidence that shows racial bias is a problem in traffic enforcement – a problem sometimes summarized as “driving while Black.”
The civil rights era of the 1960s was rife with law enforcement incidents that targeted Black drivers. As the scholar and historian Gretchen Sorin details in her 2020 book “Driving While Black,” the car simultaneously opened new possibilities of freedom as well as new hazards for Black people.
By the 1990s, the whole world witnessed the punishment that could await those caught driving while Black. In 1991, a Black man named Rodney King was stopped after a high-speed chase and beaten by police in Los Angeles. The violent encounter, captured on videotape and shared on local media, became national news.
In recent years, the police killings of Daunte Wright, Tyre Nichols and other Black drivers have shown how traffic stops can escalate quickly and sometimes lethally.
In September 2024, Miami Dolphins player Tyreek Hill was pulled over by local police on his way to a game at the Hard Rock Stadium in Miami Gardens, Florida. Police officers physically pulled Hill from his vehicle and handcuffed him. The incident raised questions about the officers’ aggressive use of force.
Our research, published in June 2024, used data on the racial composition of drivers on every street in Chicago. We then compared who is driving on roads with who is being ticketed by the city’s speed cameras and who is being stopped by the Chicago police.
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