In 1991, the Intermodal Surface Transportation Efficiency Act (ISTEA) required metropolitan planning organizations in Transportation Management Areas (TMAs) to implement a Congestion Management System (CMS). An urbanized area is designated a TMA when its population exceeds 200,000. The results of the 2000 decennial census indicated that the population of the urbanized area in Northern Ada County was 272,625. Therefore, on July 8, 2002 the Federal Highway Administration officially designated the urbanized area in Northern Ada County as a TMA. The Treasure Valley CMS Plan can be found at the link below.


Treasure Valley CMS Plan (3/25/2005)(10.5MB)

In addition, the results from other annual data collection efforts are also available. The annual system progress reports can be found below.

• 2007 Annual CMS Report (1MB)
• 2007 Congestion Maps
• 2006 Annual CMS Report (1.3MB)
• 2006 Congestion Maps (1.3MB)
• 2005 Annual CMS Report (3/10/2006) (1.3MB)
• 2005 Congestion Maps (1.4MB)
• 2004 Annual CMS Report (3/15/2005) (6.6MB)
• 2004 Congestion Maps (1.6MB)

If you have any questions regarding the CMS Plan or Annual Report, contact MaryAnn Waldinger at 855-2558 x 234.

The CMS travel time data set used to create the Annual CMS Reports is available below for the years 2003, 2004, 2005, 2006, and 2007. The data set contains the higher of the AM or PM peak travel time averages for each sampled roadway segment.

2003-2007 CMS Data Archive (4/15/08)

If you have any questions regarding the CMS Data Archive, please refer to the Annual CMS Reports or contact Yancey Willis at 855-2558 x 233.