To view map, go to or for PDF map, go to. Over time, the DWM will contract services to field verify the data and update the index card system and this online database.This dataset was last updated September 2011. The information contained in the index card system was compiled by scanning the original cards, then transcribing some of this information to prepare a table and map. The City of Chicago Department of Water Management’s (DWM) Topographic Benchmark is the source of the benchmark information contained in this online database. Note: The benchmarks are referenced to the Chicago City Datum = 0.00, (CCD = 579.88 feet above mean tide New York). This dataset contains the historical estimated congestion for the 29 traffic regions, from January 2013 to May 2018. Standard benchmarks are for public and private use in establishing a point in space. The following dataset includes "Active Benchmarks," which are provided to facilitate the identification of City-managed standard benchmarks. Together may give a better understanding of the actual traffic conditions. The segment speed and traffic region congestion estimates speed on individual arterial segments can fluctuate from heavily congested to no congestion and back in a few minutes. Intersections, traffic signals, transit movements, availability of alternative routes, crashes, short length of the segments, etc. Due to a myriad of factors, including but not limited to frequent 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 relatively longer period. There is much volatility in traffic segment speed. Much research has been done in recent years on traffic congestion prediction and traffic forecasting based on time-series data 10, 11.In the case of developing countries, the variation of motorized and non-motorized vehicles is enormous. This dataset contains the current estimated speed for about 1250 segments covering 300 miles of arterial roads. 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. Congestion by Traffic Region gives the average traffic condition for all arterial street segments within a region. Traffic Segment level congestion is available for about 300 miles of principal arterials.
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