We have made some modifications to our series of Traffic Crash datasets to address a potential privacy issue.
RD_NO (Chicago Police Department report number) column in each dataset is now blank for recent crashes. Initially, “recent” means a trailing 15 days but that could change so we recommend against any uses of the data that are sensitive to that exact number.
Each dataset now contains a new
CRASH_RECORD_ID column that can be used as a unique ID for the crash, including for purposes of linking between the datasets. This column is populated for all records, both those with
RD_NO present and those where it is blank.