The segment speed and traffic region congestion estimates together may give a better understanding of the actual traffic conditions. ViaMichelin provides details of incidents that may affect road traffic in Chicago that include: road closures, lane restrictions, accidents, roadworks, weather, special events (e.g. Speed on individual arterial segments can fluctuate from heavily congested to no congestion and back in a few minutes. 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. Most volatility in arterial speed comes from the very nature of the arterials themselves. However, the congestion estimates for the traffic regions remain consistent for a relatively longer period. There is much volatility in traffic segment speed. 29 regions are created to cover the entire city (except O’Hare airport area). A traffic region is comprised of two or three community areas with comparable traffic patterns. ![]() Traffic Segment level congestion is available for about 300 miles of principal arterials.Ĭongestion by Traffic Region gives the average traffic condition for all arterial street segments within a region. Congestion estimates by traffic segments gives observed speed typically for one-half mile of a street in one direction of traffic. Two types of congestion estimates are produced every 10 minutes: 1) by Traffic Segments and 2) by Traffic Regions or Zones. 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. ![]() The most recent estimates for each segment are in. Two types of congestion estimates are produced every 10 minutes: 1). This dataset contains the historical estimated congestion for over 1,000 traffic segments, starting in approximately March 2018. 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. Chicago Traffic Tracker: Measuring traffic on Chicago’s arterial streets 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.
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