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I-55 (I-294 to Veterans Parkway)

Graphics

Graphics:

I-55 from I-294 to Veterans Parkway Congestion Scan - 2011, showing average speed by milepost by time of day. Click on graphic to open congestion scan.

I-55 from I-294 to Veterans Parkway Congestion Scan - 2011 (click for pdf version)

I-55 from I-294 to Veterans Parkway Congestion Scan - 2009, showing average speed by milepost by time of day. Click on graphic to open congestion scan; click again to improve graphic resolution.

I-55 from I-294 to Veterans Parkway Congestion Scan - 2009 (click for pdf version)

I-55 from I-294 to Veterans Parkway Congestion Scan - 2007, showing average speed by milepost by time of day. Click on graphic to open congestion scan; click again to improve graphic resolution.

I-55 from I-294 to Veterans Parkway Congestion Scan - 2007(click for pdf version)

 

 

Performance Data

Non-holiday Tuesdays, Wednesdays, and Thursdays:

South-bound I-55

Measure 2007 2008 2009 2010 2011
Free-Flow Travel Time
(Minutes)
11.42 11.42 11.33 11.42 11.40
Average AM Peak-Period
Travel Time (Minutes)
15.02 14.70 14.13 14.36 14.60
AM Travel Time Index 1.31 1.29 1.25 1.26 1.28
Average PM Peak-Period
Travel Time (Minutes)
22.92 20.58 18.77 18.07 19.04
PM Travel Time Index

2.01

1.80

1.66

1.58 1.67
AM Peak-Period
95th Percentile Travel Time
(Minutes)

17.17

16.64

15.73

16.15 16.02

AM Peak-Period
Planning Time Index

1.50

1.46

1.39

1.41 1.40
PM Peak-Period
95th Percentile Travel Time
(Minutes)

36.16

30.37

27.51

24.44 27.14
PM Peak-Period
Planning Time Index

3.17

2.66

2.43

2.14 2.38
Congested Hours

12.28

11.80

10.58

10.94 11.24

 

North-bound I-55

Measure

2007

2008

2009

2010 2011
Free-Flow Travel Time
(Minutes)

11.40

11.44

11.44

11.52 11.44
Average AM Peak-Period
Travel Time (Minutes)

21.24

19.21

20.28

19.30 19.60
AM Travel Time Index

1.86

1.68

1.77

1.68 1.67
Average PM Peak-Period
Travel Time (Minutes)

19.57

19.37

16.80

17.62 17.26
PM Travel Time Index

1.72

1.69

1.47

1.53 1.51
AM Peak-Period
95th Percentile Travel Time
(Minutes)

35.86

32.87

35.24

31.78 30.57

AM Peak-Period
Planning Time Index

3.15

2.87

3.08

2.76 2.67
PM Peak-Period
95th Percentile Travel Time
(Minutes)

38.41

38.82

30.25

31.01 28.68
PM Peak-Period
Planning Time Index

3.37

3.39

2.64

2.69 2.51
Congested Hours

11.57

11.19

9.87

10.84 10.85
 

 

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