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I-355 Veterans Memorial Tollway (I-88 to North Avenue)

Graphics

I-355, Veterans Memorial Tollway from I-88 to IL-64 Congestion Scan - 2011. Click on graphic to open congestion scan.

I-355, Veterans Memorial Tollway from I-88 to IL-64 Congestion Scan - 2011 (click for pdf version)

I-355, Veterans Memorial Tollway from I-88 to IL-64 Congestion Scan - 2009. Click on graphic to open congestion scan; click again to improve graphic resolution.

I-355, Veterans Memorial Tollway from I-88 to IL-64 Congestion Scan - 2009 (click for pdf version)

I-355, Veterans Memorial Tollway from I-88 to IL-64 Congestion Scan - 2007.Click on graphic to open congestion scan; click again to improve graphic resolution.

I-355, Veterans Memorial Tollway from I-88 to IL-64 Congestion Scan - 2007 (click for pdf version)

Performance Data

Non-holiday Tuesdays, Wednesdays, and Thursdays:

South-bound I-355/Veterans Memorial Tollway

Measure 2007 2008 2009 2010 2011
Free-Flow Travel Time
(Minutes)
7.06 8.08 8.56 8.35 8.01
Average AM Peak-Period
Travel Time (Minutes)
7.75 8.92 9.32 10.10 8.80
AM Travel Time Index 1.10 1.10 1.09 1.21 1.10
Average PM Peak-Period
Travel Time (Minutes)
8.79 10.85 10.67 9.96 9.51
PM Travel Time Index

1.24

1.34

1.25

1.19 1.19
AM Peak-Period
95th Percentile Travel Time
(Minutes)

8.15

9.74

9.78

13.32 9.31

AM Peak-Period
Planning Time Index

1.15

1.21

1.14

1.60 1.16
PM Peak-Period
95th Percentile Travel Time
(Minutes)

11.17

14.65

14.11

13.71 12.69
PM Peak-Period
Planning Time Index

1.58

1.81

1.65

1.64 1.58
Congested Hours

9.53

9.72

10.43

7.30 1.78

 

North-bound I-355/Veterans Memorial Tollway

Measure

2007

2008

2009

2010 2011
Free-Flow Travel Time
(Minutes)

6.82

7.58

8.55

8.04 8.47
Average AM Peak-Period
Travel Time (Minutes)

8.44

9.16

9.89

10.05 9.80
AM Travel Time Index

1.24

1.21

1.16

1.25 1.16
Average PM Peak-Period
Travel Time (Minutes)

7.33

8.46

9.08

9.32 9.06
PM Travel Time Index

1.07

1.12

1.06

1.16 1.07
AM Peak-Period
95th Percentile Travel Time
(Minutes)

11.38

11.74

12.50

14.58 12.33

AM Peak-Period
Planning Time Index

1.67

1.55

1.46

1.81 1.46
PM Peak-Period
95th Percentile Travel Time
(Minutes)

7.93

9.58

9.66

11.84 9.75
PM Peak-Period
Planning Time Index

1.16

1.26

1.13

1.47 1.15
Congested Hours

1.77

3.08

6.94

9.26 5.78

 

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