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I-90 Jane Addams Memorial Tollway (Boone County Line Road to IL-31) Crash Scan

Crash scans show the rate of total highway crashes per 100 million vehicle-miles traveled (VMT) for 1/10 mile segments.  The purpose of these crash scans is to show highway planners and system managers how crashes are related to congestion.  Understanding where crashes are concentrated can help planners and engineers focus on improving those locations with the worst performance.  

Crash Scan

I-90 Jane Addams Tollway, Boone County Line Road to IL-31 Crash Scan, 2008-12. Showing number of crash rates per 100 million vehicle miles traveled.

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Performance Data

Non-holiday Tuesdays, Wednesdays, and Thursdays:

East-bound I-90/Jane Addams Memorial Tollway

Measure 2010 2011
Free-Flow Travel Time
(Minutes)

21.58

21.29
Average AM Peak-Period
Travel Time (Minutes)
22.26 22.09
AM Travel Time Index 1.03 1.04
Average PM Peak-Period
Travel Time (Minutes)
22.16 22.18
PM Travel Time Index

1.03

1.04
AM Peak-Period
95th Percentile Travel Time
(Minutes)

23.45

23.55

AM Peak-Period
Planning Time Index

1.09

1.11
PM Peak-Period
95th Percentile Travel Time
(Minutes)

23.18

23.30
PM Peak-Period1.07
Planning Time Index

1.07

1.09
Congested Hours

0.15

0.25

West-bound I-90/Jane Addams Memorial Tollway

Measure

2010

2011
Free-Flow Travel Time
(Minutes)

21.89

21.38
Average AM Peak-Period
Travel Time (Minutes)
22.85 22.85
AM Travel Time Index

1.04

1.07
Average PM Peak-Period
Travel Time (Minutes)

22.68

22.60
PM Travel Time Index

1.04

1.06
AM Peak-Period
95th Percentile Travel Time
(Minutes)

24.31

25.74

AM Peak-Period
Planning Time Index

1.11

1.20
PM Peak-Period
95th Percentile Travel Time
(Minutes)

24.07

25.31
PM Peak-Period
Planning Time Index

1.10

1.18
Congested Hours

0.23

1.37

 

About the Data

Data provided by IDOT, Illinois Tollway, and HERE. 

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