Graphics:

I-57 from I-94 to I-80 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-57 from I-94 to I-80 Congestion Scan - 2009 (click for pdf version)

I-57 from I-94 to I-80 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-57 from I-94 to I-80 Congestion Scan - 2007 (click for pdf version)

Performance Data:

Non-holiday Tuesdays, Wednesdays, and Thursdays:

South-bound I-57

 

Measure	2007	2008	2009	2010	2011
Free-Flow Travel Time (Minutes)	13.80	12.70	13.08	13.83	13.59
Average AM Peak-Period Travel Time (Minutes)	15.04	13.57	13.98	15.24	15.82
AM Travel Time Index	1.09	1.07	1.07	1.10	1.16
Average PM Peak-Period Travel Time (Minutes)	15.25	15.18	15.74	15.77	15.23
PM Travel Time Index	1.10	1.20	1.20	1.14	1.12
AM Peak-Period 95th Percentile Travel Time (Minutes)	17.41	14.48	15.32	17.36	17.35
AM Peak-Period Planning Time Index	1.26	1.14	1.17	1.26	1.28
PM Peak-Period 95th Percentile Travel Time (Minutes)	17.98	20.43	20.26	18.51	17.69
PM Peak-Period Planning Time Index	1.30	1.61	1.55	1.34	1.30
Congested Hours	3.48	2.31	2.48	8.40	2.43

 

 North-bound I-57

 

Measure	2007	2008	2009	2010	2011
Free-Flow Travel Time (Minutes)	14.13	12.57	13.78	14.55	13.81
Average AM Peak-Period Travel Time (Minutes)	19.47	15.83	18.00	19.19	20.86
AM Travel Time Index	1.38	1.26	1.31	1.32	1.51
Average PM Peak-Period Travel Time (Minutes)	15.94	13.57	14.54	15.15	14.84
PM Travel Time Index	1.13	1.08	1.06	1.07	1.07
AM Peak-Period 95th Percentile Travel Time (Minutes)	27.37	22.34	27.50	28.56	32.54
AM Peak-Period Planning Time Index	1.94	1.78	2.00	1.96	2.36
PM Peak-Period 95th Percentile Travel Time (Minutes)	22.45	14.97	16.64	16.82	16.11
PM Peak-Period Planning Time Index	1.59	1.19	1.21	1.16	1.17
Congested Hours	6.38	2.43	6.67	12.54	3.86