Performance Measurement

NEW! CMAP Regional Bridge Conditions Report (May, 2009)

Bridge conditions, while improving overall, vary greatly by owner and geography.  This report shows regional trends and summary information for regional bridges from several perspectives.  The report also explains the bridge condition rating system, allowing policy personnel and the public to understand this important issue.

Bridge Conditons in the CMAP Region, 2007  

NEW! Preview of Strategic Regional Arterial Congestion Measurement: Illinois Route 47, Kane and McHenry Counties (April 2009)

CMAP has demonstrated the feasibility of collecting and analyzing IDOT hourly traffic data to calculate arterial congestion (using a travel time index) and speeds (using a midpoint pace speed).  While the analysis may be based on only a single day of data, the result still provides the first regional measurement of arterial operating conditions.  We anticipate that future additional data will provide more reliable measurements.

 Illinois Route 47 Congestion and Speeds 

Trends in Metropolitan Freeway Vehicle Miles Travelled (VMT), 1995-2007 (Revised March, 2009)

Vehicle Miles Travelled (VMT) on freeways in metropolitan Chicago grew steadily from 40.9 million in 1995 to 47.5 million in 2004.  From 2004 to 2006, freeway VMT fell to 45.5 million, before rising again to 46.5 million in 2007.  Early analyses of 2008 VMT indicates a decline, though final numbers are not yet available.  The 2005-2006 interruption in expressway VMT growth was unusual.  The VMT trend analysis explores the factors that may have led to the declines in VMT.

Recent Trends in Northeastern Illinois Expressway Vehicle Miles Traveled (VMT)  

As referenced by the Chicago Tribune's Jon Hilkevitch ("Traffic down to mile, minute"), the CMAP data and images on this page illustrate congestion patterns on the freeways and tollways in the Chicago region.  The congestion scans and data were compiled through our Congestion Management Process.  Based on the latest data (from 2007), they show basic congestion, travel time, and travel time reliability information for Chicago-area expressways and tollways that have sufficient instrumentation to calculate average travel speed.  Although the information we posted on the web is of general interest, we can make additional graphic information available on request for use by traffic operations staff and highway engineers.  Please contact Tom Murtha (312-386-8790 or tmurtha@cmap.illinois.gov) for more information.

I-290 Eisenhower Expressway from Canal Street to Wolf Rd.

I-290 from Wolf Rd. to I-90

I-90 Kennedy Expressway from I-94 to I-190

I-90/94 Kennedy Expressway from I-290 to I-90/I-94 split

I-90/94 Kennedy Reversible Lanes from Ogden Ave. to Montrose Ave. 

I-94 Edens Expressway from Kennedy Expressway to Deerfield Rd.

I-55 Stevenson Expressway from Lake Shore Dr. to I-294 

I-55 from I-294 to Veterans Pkwy.

I-57 from I-94 to I-80

I-80 from I-294 to La Grange Rd.

I-190 from I-90 to O'Hare

I-88 Ronald Reagan Memorial Tollway from I-294 to Mitchell Rd. 

I-90 Jane Addams Memorial Tollway from I-294 to Elgin Ave.  

I-294/94 Tri-State Tollway from I-90 to Everett Rd. 

I-294 Tri-State Tollway from I-55 to I-90 

I-94 Edens Spur Tollway from I-94/U.S. 41 split to I-94/I-294 Merge 

I-355 Veterans Memorial Tollway from I-88 to North Ave. 

I-355 Veterans Memorial Tollway from I-55 to I-88 

Elgin O'Hare Expressway from IL 53 to IL 20  

IL-53 from I-290/I90 to Lake Cook Rd. 

Lake Shore Drive/US 41 from Foster Ave. to Jackson Blvd. 

Lake Shore Drive/US 41 from Roosevelt Rd. to Marquette Dr. 

No data for the following segments due to construction.

I-90/94 from I-290 to Chicago Skyway (Local Lanes)

I-90/94 from I-55 to Chicago Skyway (Express Lanes)

I-94 from Chicago Skyway to I-94/I-57 split

I-94 from I-94/I-57 split to Kingery Expwy.

I-80/94 from Illinois/Indiana state line to I-94

I-294 from Bishop Ford Frwy. to I-55

I-290 Eisenhower Expressway from Canal Street to Wolf Rd. 

I-290 Congestion Scan
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Click here for pdf version. (1.3 MB)

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I-290 from Wolf Rd. to I-90 

I-290 Congestion Scan
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I-90 Kennedy Expressway from I-94 to I-190 

I-90 Congestion Scan
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Click here for pdf version. (1.2 MB) 

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I-90/94 Kennedy Expressway from I-290 to I-90/I-94 split 

I-90/94 Congestion Scan
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(click again to zoom in on larger image).

Click here for pdf version. (1.4 MB)