Graphics:

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

 

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

 

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