The vast majority of Chicago bike tickets go to cyclists in black neighborhoods, despite past criticism by community and cycling advocates that enforcement is uneven across the city.
I performed the data analysis that drove the story, written by Mary Wisniewski of the Chicago Tribune. I plotted and analyzed tens of thousands of rows of city data to show where these citations — mostly for riding a bicycle on the sidewalk — were being issued. An initial story was published in the spring of 2017. A follow up early in 2018 (archive) showed — despite promises from city official that change would happen — that the pattern continued.
I created multiple maps and charts to display online and in print.