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I-90 Jane Addams Memorial Tollway (I-294 to Elgin Avenue) Congestion Scans

The Chicago region traffic congestion scans were created by averaging five minute speed data obtained from freeway loop detectors, radar, and mobile technology data. The traffic scans display average speed on a freeway corridor as a function of time of day (the x-axis) and location (the y-axis) along a freeway corridor.

Congestion Scans

I-90, Jane Addams Memorial Tollway from I-294 to Elgin Avenue Congestion Scan, 2009. Showing average speed by milepost by time of day.

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I-90, Jane Addams Memorial Tollway from I-294 to Elgin Avenue Congestion Scan, 2007. Showing average speed by milepost by time of day.

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Performance Data

Non-holiday Tuesdays, Wednesdays, and Thursdays:

East-bound I-90/Jane Addams Memorial Tollway

Measure 2007 2008 2009
Free-Flow Travel Time
(Minutes)
22.72 22.75 23.41
Average AM Peak-Period
Travel Time (Minutes)
29.07 28.38 28.14
AM Travel Time Index 1.28 1.25 1.20
Average PM Peak-Period
Travel Time (Minutes)
26.52 26.45 25.63
PM Travel Time Index

1.17

1.16

1.09

AM Peak-Period
95th Percentile Travel Time
(Minutes)

37.07

38.23

38.45

AM Peak-Period
Planning Time Index

1.63

1.68

1.64

PM Peak-Period
95th Percentile Travel Time
(Minutes)

36.03

35.60

31.16

PM Peak-Period
Planning Time Index

1.59

1.57

1.33

Congested Hours

4.83

4.07

2.65

West-bound I-90/Jane Addams Memorial Tollway

Measure

2007

2008

2009

Free-Flow Travel Time
(Minutes)

22.19

22.42

23.60

Average AM Peak-Period
Travel Time (Minutes)

23.43

23.81

25.06

AM Travel Time Index

1.06

1.06

1.06

Average PM Peak-Period
Travel Time (Minutes)

26.94

28.39

29.19

PM Travel Time Index

1.21

1.27

1.24

AM Peak-Period
95th Percentile Travel Time
(Minutes)

24.36

25.49

27.56

AM Peak-Period
Planning Time Index

1.10

1.14

1.17

PM Peak-Period
95th Percentile Travel Time
(Minutes)

33.88

37.95

38.73

PM Peak-Period
Planning Time Index

1.53

1.69

1.64

Congested Hours

1.50

1.85

2.07

 

About the Data

Data provided by IDOT, Illinois Tollway, and HERE. 

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