In order to help contractors and private residents avoid existing utility lines (including gas, electrical, and water lines) when digging, the Chicago Department of Transportation maintains 811 Chicag
Population totals for groupings commonly used in other datasets. Not all values are available for all years. Note that because the "Citywide" rows roll up the values from the individual ZIP Codes and
List of City of Chicago licensed Public Chauffeurs, who may operate a licensed Taxicab, Livery, or Horse-Drawn Carriage. For more information on the Public Chauffeur program, please see http://www.cit
