Transportation Data

The Chicago Metropolitan Agency for Planning (CMAP) prepares future traffic projections, supported by a substantial regional travel demand modeling system and a large-scale travel survey. The agency also monitors, analyzes, and provides information on transportation system performance. Find more transportation data on CMAP’s Data Hub.

Household travel survey

CMAP periodically surveys households throughout northeastern Illinois about their travel habits to learn more about how and why people navigate the region. The next survey kicks off in 2024.

Household travel survey

Modeling

CMAP is the primary agency responsible for the development and maintenance of travel forecasting methods for northeastern Illinois. CMAP’s travel demand models predict transportation system use under a variety of socioeconomic conditions and public policy scenarios.

CMAP modeling

Regional Transportation Authority Mapping and GIS Portal

The Regional Transportation Authority Mapping and Geographic Information Systems Portal contains mapping apps and initiative dashboards, including interactive and downloadable GIS data.

Regional Transportation Authority Mapping and Statistics

Regional Transportation Authority Mapping and Statistics is a collection of tools for accessing data resources about the six-county metropolitan Chicago region’s transit system developed and maintained by the RTA.

Illinois Department of Transportation Open Data Portal

The Illinois Department of Transportation Open Data Portal is a platform for exploring and downloading GIS data, as well as discovering and building apps.

Safety data

The Illinois Department of Transportation also shares safety data, including fatal crash fatalities and safety tiers, which highlight intersections and corridors with higher crash counts.