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I-355 Veterans Memorial Tollway (I-55 to I-88)

Graphics

I-355, Veterans Memorial Tollway from I-55 to I-88 Congestion Scan - 2011. Click on graphic to open congestion scan.

I-355, Veterans Memorial Tollway from I-55 to I-88 Congestion Scan - 2011 (click for pdf version)

I-355, Veterans Memorial Tollway from I-55 to I-88 Congestion Scan - 2009. Click on graphic to open congestion scan; click again to improve graphic resolution.

I-355, Veterans Memorial Tollway from I-55 to I-88 Congestion Scan - 2009 (click for pdf version)

I-355, Veterans Memorial Tollway from I-55 to I-88 Congestion Scan - 2007. Click on graphic to open congestion scan; click again to improve graphic resolution.

I-355, Veterans Memorial Tollway from I-55 to I-88 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)
7.95 8.19 8.25 8.63 8.73
Average AM Peak-Period
Travel Time (Minutes)
8.73 9.05 9.31 9.59 9.40
AM Travel Time Index 1.10 1.10 1.13 1.11 1.08
Average PM Peak-Period
Travel Time (Minutes)
9.07 10.44 9.46 9.98 9.99
PM Travel Time Index

1.14

1.27

1.15

1.16 1.14
AM Peak-Period
95th Percentile Travel Time
(Minutes)

9.22

9.54

10.63

10.49 9.90

AM Peak-Period
Planning Time Index

1.16

1.16

1.29

1.22 1.13
PM Peak-Period
95th Percentile Travel Time
(Minutes)

10.17

13.06

11.02

13.18 11.89
PM Peak-Period
Planning Time Index

1.28

1.59

1.34

1.53 1.36
Congested Hours

4.66

6.09

4.15

4.48 2.77

 

North-bound I-355/Veterans Memorial Tollway

Measure

2007

2008

2009

2010 2011
Free-Flow Travel Time
(Minutes)

8.21

8.34

7.99

8.53 8.57
Average AM Peak-Period
Travel Time (Minutes)

13.37

15.88

9.74

10.91 10.82
AM Travel Time Index

1.63

1.90

1.22

1.28 1.26
Average PM Peak-Period
Travel Time (Minutes)

8.52

8.90

8.38

8.98 8.92
PM Travel Time Index

1.04

1.07

1.05

1.05 1.04
AM Peak-Period
95th Percentile Travel Time
(Minutes)

24.71

28.81

13.79

18.23 16.27

AM Peak-Period
Planning Time Index

3.01

3.45

1.73

2.14 1.90
PM Peak-Period
95th Percentile Travel Time
(Minutes)

8.84

9.88

8.89

9.52 9.28
PM Peak-Period
Planning Time Index

1.08

1.18

1.11

1.12 1.08
Congested Hours

2.10

3.42

3.92

2.89 2.39
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