The initial Congestion Management network for Southwestern Pennsylvania was defined in cooperation with an interagency task force made up of transportation professionals from the SPC region.  The purpose of defining a CMP monitoring network is to identify corridors where existing congestion occurs and those where future congestion is anticipated.  In addition to congestion impacts on automobile traffic, the network needs to be sensitive to its impacts on freight and transit service as well.  The network also needs to be defined in a way that makes CMP data collection and monitoring reasonable and manageable within available resources.

The initial CMP monitoring network covered approximately 471 miles and has been updated and adjusted periodically since its inception in 1995.  This included expanding the network to include corridors in new member counties (Greene, Indiana, Fayette, and Lawrence) as they joined SPC.  Currently, the CMP network includes 113 corridors covering approximately 540 miles.  These corridors include numerous interstates and principal arterials as well as a few minor arterials.

Each CMP corridor is divided into segments and nodes for the purposes of data collection and analysis.  Nodes are typically located at major intersecting roadways or other significant features.  These nodes, and the segments they define, are adjusted as necessary to facilitate data collection.

CMP Corridor Maps:

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For more information about our Congestion Management program, contact Doug Smith at (412) 391-5590 x327 or e-mail dsmith@spcregion.org.

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