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Accelerated Bridge Program Massachusetts Department of transporatation
Casey Overpass Project

Upcoming Work

3 Week Look Ahead: April 20 - May 8

During the first week covered by this three week look nighttime gas line work by National Grid in the vicinity of Forest Hills Street and Shea Circle will continue. Likewise for this first week, Verizon will continue work to relocate communications equipment at the intersection of South Street/New Washington Street.

During the three weeks included in this look ahead, temporary traffic signals will begin coming on-line. Adjustments to temporary signal operations will be ongoing as traffic conditions warrant.

Work will not take place on April 20th in recognition of Patriots’ Day.

Operations for the week of April 20th will include the following:

  • Continued construction of the temporary road along the westbound Arborway surface roadway between Shea Circle and the westbound Arborway on-ramp at South Street including:
    • Removal of existing street lighting and energizing of temporary lighting
    • Installation of pavement markings
    • Installation of temporary barrier
    • Additional ancillary operations associated with preparing the temporary roadway for use

Operations for the week of April 27th will address:

  • Continued construction of the temporary road along the westbound Arborway surface roadway between Shea Circle and the westbound Arborway on-ramp at South Street including:
    • Installation of pavement
    • Installation of pavement markings
    • Activation of temporary traffic signals at the westbound Arborway surface road and Washington Street and New Washington Street and South Street
  • Place westbound traffic on the northern portion of the temporary surface roadway.
  • Temporary closure of the exit of Forest Hills Street into Shea Circle. Traffic seeking to access Shea Circle from Forest Hills Street southbound will be routed via Cemetery Road.
  • Removal of a portion of the eastern (Shea Circle end) abutment of the Casey Overpass
  • On New Washington Street, temporary signage will be installed
  • West of South Street along the on-ramp to the Arborway retaining wall removal and temporary lane construction will continue.

During the first full week of May, operations will continue to focus on the area around the westbound Arborway on-ramp including paving of temporary roadway and installation of striping and signage.

All work is subject to weather conditions.

About This Project

The Monsignor William J. Casey Overpass is the elevated section of Route 203 which carries the Arborway over Washington and South Street in the Jamaica Plain neighborhood of the City of Boston. The Overpass is located directly north of the Forest Hills Station. (See locus map). The area around the overpass serves many neighborhoods and traveling consistencies including pedestrians, cyclists, MBTA riders and motorists. The area also acts as an important gateway to such Boston institutions as Franklin Park, Forest Hills Cemetery, Shattuck Hospital and the Arnold Arboretum. In 2010, the overpass was determined to be structurally deficient, suffering from numerous superstructure and substructure problems due to a combination of deterioration and original design flaws and beyond the point of effective repair.

This project consists of removing the existing structurally deficient 1,650’ Casey Overpass and replacing it with a simplified at-grade reconstructed roadway network. A new fully accessible Orange Line access/egress headhouse will replace the existing substandard exit only headhouse. Bicycle and pedestrian accommodations will be enhanced throughout the project limits. The Route 39 bus will be relocated to the reconstructed upper busway at Forest Hills Station. The project will result in the reconnection of the Arborway and Emerald Necklace Park from the Arnold Arboretum to Franklin Park.

The streetscape has been designed with permeable pavers along sidewalks and bike paths. The runoff of water into these pavers will help to water the trees planted within the permeable paver areas. Existing granite block and cobblestone are being reclaimed from the project area for use in the proposed medians and short retaining walls. There is a net increase of approximately 560 trees. These proposed trees will contribute to the reconnected Emerald Necklace Park and Arborway. The project area contains four larger plaza areas: Toole Square, Southwest Corridor Park Plaza, MBTA North Plaza, and Shea Square Plaza. Each of these areas has unique aspects.

  • Toole square has been redesigned as a passive park, with winding paths.
  • Southwest Corridor Park Plaza creates a grander entrance to Southwest Corridor Park, with an innovative bicycle roundabout to direct bicycles and pedestrians through the entrance and an “urban park” of trees.
  • The MBTA Forest Hills Station North Plaza has been designed to provide clear paths for MBTA patrons while opening the plaza to possible other uses, such as farmers’ markets.
  • Shea Square replaces the existing Shea Circle, providing historical information about the old circle, Franklin Park and Morton Street, while creating a small resting area and park where the travel lanes of the rotary currently are.

The Upper Busway of the Forest Hills MBTA Station is designed to minimize light pollution to neighboring communities, with short walls placed to block headlights from hitting the houses without impeding views, and a landscaped buffer area along the Busway to provide separation.

View historical information on the Design/Planning process for the Casey Arborway Project on the Project Overview page.

what's new


Notice to Proceed (NTP) was issued to MassDOT’s selected general contractor for this project Barletta Heavy Division on December 15th, 2014. As of the first quarter of 2015, the project is underway addressing the initial steps of construction.

Upcoming Meetings


Monthly MassDOT
Office Hours Reminder

Tuesday, April 21
5:30 to 7:30PM
Curtis Hall Community Center
Community Room - 1st Floor
20 South Street, Jamaica Plain

Traffic Advisories


There are currently no Traffic or Transit Advisories.

Email Updates


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