This is a Non-Federal dataset covered by different Terms of Use than Data.gov.

Chicago Traffic Tracker - Historical Congestion Estimates by Segment - 2011-2018

Metadata Updated: September 16, 2020

This dataset contains the historical estimated congestion for 1270 traffic segments, in selected time periods from August 2011 to May 2018. Newer records are in https://data.cityofchicago.org/d/sxs8-h27x. The most recent estimates for each segment are in https://data.cityofchicago.org/d/n4j6-wkkf.

The Chicago Traffic Tracker estimates traffic congestion on Chicago’s arterial streets (non-freeway streets) in real-time by continuously monitoring and analyzing GPS traces received from Chicago Transit Authority (CTA) buses. Two types of congestion estimates are produced every 10 minutes: 1) by Traffic Segments and 2) by Traffic Regions or Zones. Congestion estimates by traffic segments gives observed speed typically for one-half mile of a street in one direction of traffic. Traffic Segment level congestion is available for about 300 miles of principal arterials. Congestion by Traffic Region gives the average traffic condition for all arterial street segments within a region. A traffic region is comprised of two or three community areas with comparable traffic patterns. 29 regions are created to cover the entire city (except O’Hare airport area). There is much volatility in traffic segment speed. However, the congestion estimates for the traffic regions remain consistent for a relatively longer period. Most volatility in arterial speed comes from the very nature of the arterials themselves. Due to a myriad of factors, including but not limited to frequent intersections, traffic signals, transit movements, availability of alternative routes, crashes, short length of the segments, etc. Speed on individual arterial segments can fluctuate from heavily congested to no congestion and back in a few minutes. The segment speed and traffic region congestion estimates together may give a better understanding of the actual traffic conditions. Current estimates of traffic congestion by region are available at http://bit.ly/Vz3rIh.

Access & Use Information

Public: This dataset is intended for public access and use. Non-Federal: This dataset is covered by different Terms of Use than Data.gov. License: No license information was provided.

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Dates

Metadata Created Date February 4, 2015
Metadata Updated Date September 16, 2020

Metadata Source

Harvested from Chicago JSON

Additional Metadata

Resource Type Dataset
Metadata Created Date February 4, 2015
Metadata Updated Date September 16, 2020
Publisher data.cityofchicago.org
Unique Identifier https://data.cityofchicago.org/api/views/77hq-huss
Maintainer
Public Access Level public
Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
Metadata Catalog ID https://data.cityofchicago.org/data.json
Schema Version https://project-open-data.cio.gov/v1.1/schema
Catalog Describedby https://project-open-data.cio.gov/v1.1/schema/catalog.json
Harvest Object Id 5a9baf9e-7391-4870-ad98-38abca24e491
Harvest Source Id added36a-9183-4385-a0e5-dd478946b24c
Harvest Source Title Chicago JSON
Data First Published 2018-05-04
Homepage URL https://data.cityofchicago.org/d/77hq-huss
Data Last Modified 2018-07-11
Source Datajson Identifier True
Source Hash 0e40583ba56db3f185f081c372e861fcc70b7352
Source Schema Version 1.1
Category Transportation

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