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I-90/94 Dan Ryan Expressway (Express Lanes I-90 Skyway to I-55) 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-90/94, Dan Ryan Express Lanes from I-55 to I-90 Chicago Skyway Congestion Scan, 2011. Showing average speed by milepost by time of day. 

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I-90/94, Dan Ryan Express Lanes from I-55 to I-90 Chicago Skyway Congestion Scan, 2009. Showing average speed by milepost by time of day. 

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2007 congestion scans are unavailable for this highway segment because of construction activity at the time. Scans will be produced for subsequent years when data is available.

 

Performance Data

2007 performance measures are unavailable for this highway segment because of construction activity at the time. Performance measures will be produced for subsequent years when data is available.

Non-holiday Tuesdays, Wednesdays, and Thursdays:

East-bound I-90/94 Dan Ryan Express Lanes

Measure 2008 2009 2010 2011
Free-Flow Travel Time
(Minutes)

 

3.75 4.10 4.48
Average AM Peak-Period
Travel Time (Minutes)

 

4.21 4.51 4.72
AM Travel Time Index

 

1.12 1.10 1.06
Average PM Peak-Period
Travel Time (Minutes)

 

4.52 4.95 7.24
PM Travel Time Index

 

1.21 1.21 1.62
AM Peak-Period
95th Percentile Travel Time
(Minutes)

 

5.26 5.46 5.40

AM Peak-Period
Planning Time Index

 

1.40 1.33 1.21
PM Peak-Period
95th Percentile Travel Time
(Minutes)

 

6.36 5.72 10.05
PM Peak-Period
Planning Time Index

 

1.70 1.40 2.24
Congested Hours

 

0.68 .34 7.70

West-bound I-90/94 Dan Ryan Express Lanes

Measure

2008

2009 2010 2011
Free-Flow Travel Time
(Minutes)

 

3.75 4.27 4.39
Average AM Peak-Period
Travel Time (Minutes)

 

4.77 5.38 4.97
AM Travel Time Index

 

1.27 1.26 1.13
Average PM Peak-Period
Travel Time (Minutes)

 

4.13 4.73 4.74
PM Travel Time Index

 

1.10 1.11 1.08
AM Peak-Period
95th Percentile Travel Time
(Minutes)

 

7.76 6.46 6.04

AM Peak-Period
Planning Time Index

 

2.07 1.51 1.38
PM Peak-Period
95th Percentile Travel Time
(Minutes)

 

5.26 6.16 5.82
PM Peak-Period
Planning Time Index

 

1.40 1.44 1.33
Congested Hours

 

1.08 1.74 5.18

 

About the Data

Data provided by IDOT, Illinois Tollway, and HERE. 

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