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.

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

Northern Illinois Transit Authority Data Portal

The Northern Illinois Transit Authority Data Portal is a collection of tools for accessing data resources about the six-county metropolitan Chicago region’s transit system developed and maintained by the Northern Illinois Transit Authority.

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.