Congestion Management Process

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The Congestion Management Process (CMP) monitors the transportation network to determine the locations and sources of congestion in the Boston MPO area, and identifies and implements strategies that alleviate congestion. The Boston Region MPO´s CMP monitors the performance of the following types of transportation facilities in the MPO area:

  • Freeway and arterial roadways
  • Intersections
  • Transit
  • Park-and-ride lots
  • High-occupancy-vehicle (HOV) lanes, and
  • Bicycle and pedestrian facilities

CMP Report - Boston Region MPO Congestion Management Process Performance-Based Planning for Efficiency, Mobility, and Safety

About the CMP

CMP monitoring leads to recommendations for studies to be programmed in the Unified Planning Work Program (UPWP) and for improvements to be implemented through the Transportation Improvement Program (TIP) and Long-Range Transportation Plan (LRTP). Federal legislation requires that, in metropolitan areas that do not meet the national ambient air quality standards, capacity-increasing projects for single-occupant vehicles be part of an approved CMP.

In 2012, the MPO established a congestion management committee to ensure that the appropriate congestion mitigation strategies are evaluated and promoted for funding in the UPWP, TIP, and LRTP.

2019 Express-Highway and 2015 Arterial Roadway Performance Dashboards

The Express-Highway Performance Dashboard graphically displays peak-period congestion for expressways in 2019;
Arterial Performance Dashboard graphically display peak-period congestion for arterials in the Boston Region MPO area in 2015. The performance measures in the dashboards represent three factors related to congestion: duration, intensity, and travel time reliability. Each dashboard consists of regional overview maps, route-specific data, and downloadable accessible tables. The data used in the express-highway dashboard was collected in 2019 by INRIX and processed by CTPS staff; the data used in the arterial dashboard was collected in 2015 by INRIX and processed by CTPS staff.

Express Highways

Arterial Roadways

Intersection Improvement Program

The intersection improvement program—which recommended low-cost operational improvements at signalized intersections in the Boston Region MPO area—was funded by the Congestion Mitigation and Air Quality Improvement (CMAQ) program. This program received direct funding to retime traffic signals, and to make recommendations for other potential improvements, but not to implement the recommended improvements. Thus, municipalities could choose to effect these suggestions at their discretion, but needed to absorb the implementation costs themselves. A summary of the pilot program, which was completed by Howard Stein Hudson, can be viewed at the link below. Mini-reports for any of the evaluated intersections are available upon request by contacting Ryan Hicks at

Intersection Improvement Program Summary (PDF) (HTML)

Recent CMP Products

New and Emerging Metrics for Roadway Usage

Traffic Congestion in the Boston Region – Beyond the Daily Commute

Pedestrian Report Card Assessment

Congestion Scan Methodology (PDF) (HTML)

2015 Express-Highway Performance Dashboard

2012 Express-Highway Performance Dashboard

2012 Arterial Performance Dashboard

2012-13 Inventory of Park-and-Ride Lots at MBTA Facilities  (PDF) (HTML)

2012 Inventory of Bicycle Parking Spaces and Number of Parked Bicycles at MBTA Stations  (PDF) (HTML)

All CMP products and documents, including those prior to 2013

For more information, please contact Ryan Hicks, MPO Staff, at 857.702.3661 or