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I-290 (I-355/IL-53 to I-90/IL-53) Congestion Scan

The Chicago region traffic congestion scans were created by averaging five minute speed data obtained from freeway loop detectors 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 Scan

I-290/IL-53 from I-355 to I-90/IL-53 Congestion Scan, 2011. Showing average speed by milepost by time of day. 

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Performance Data

Non-Holiday Tuesdays, Wednesdays, Thursdays:

East-bound I-290/IL-53

Measure 2010 2011
Free-Flow Travel Time
(Minutes)
6.21 5.96
Average AM Peak-Period
Travel Time (Minutes)
7.75 6.64
AM Travel Time Index 1.25 1.11
Average PM Peak-Period
Travel Time (Minutes)
10.75 7.47
PM Travel Time Index

1.73

1.25
AM Peak-Period
95th Percentile Travel Time
(Minutes)

13.70

7.65

AM Peak-Period
Planning Time Index

2.21

1.28
PM Peak-Period
95th Percentile Travel Time
(Minutes)

23.63

11.20
PM Peak-Period
Planning Time Index

3.80

1.88
Congested Hours

5.26

1.24

West-bound I-290/IL-53

Measure

2010

2011
Free-Flow Travel Time
(Minutes)

6.12

5.89
Average AM Peak-Period
Travel Time (Minutes)

6.88

7.06
AM Travel Time Index

1.12

1.20
Average PM Peak-Period
Travel Time (Minutes)

7.14

7.12
PM Travel Time Index

1.17

1.21
AM Peak-Period
95th Percentile Travel Time
(Minutes)

8.66

7.84

AM Peak-Period
Planning Time Index

1.42

1.33
PM Peak-Period
95th Percentile Travel Time
(Minutes)

9.71

9.27
PM Peak-Period
Planning Time Index

1.59

1.57
Congested Hours

1.76

0.49

 

About the Data

Data provided by IDOT, Illinois Tollway, and Traffic.com. 

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