Riley O'Neil was riding in an unprotected bike lane when someone in a parked car opened their door in front of him, and he fell into the street, where he was hit by another vehicle.
O'Neil was an employee who worked for the city's Complete Streets team ā which aims to make streets safer for drivers, pedestrians, cyclists, and public transit ā and previously led CDOT's bike parking program for several years.
https://www.cbsnews.com/chicago/news/cdot-worker-riley-oneil-killed-bicycle-crash-bridgeport/

Cycling advocates mourn Chicago Department of Transportation worker killed while riding bike in Bridgeport
A cyclist killed in a crash in the Bridgeport neighborhood on Friday afternoon was an employee with the Chicago Department of Transportation who spent years working on improving the city's bicycle infrastructure.