Accelerated Bridge Program Massachusetts Department of transporation
Route 79/Braga Bridge Improvements Project

Design & Construction


Construction of the Route 79/Braga Bridge Improvements Project is taking place in five stages, concurrent with the Braga Bridge Phase II work. Stages 1A through 1C consist of demolition and reconstruction of Route 79/138. Stages 2A and 2B consist of demolition and reconstruction of the I-195 ramps. Full beneficial use of Routes 79 and 138 and local roads, where all modes of travel are in their final configurations, is scheduled for fall 2016.

Braga Bridge structural steel repairs, cleaning, painting, and replacement of the concrete deck are complete and remaining work will be completed by winter 2016/2017.

Accelerated Bridge Methods

MassDOT and the Design/Build Team evaluated several accelerated bridge construction techniques and alternative technical concepts (ATCs) to complete the project as quickly and efficiently as possible. These include:

  • Use of precast concrete elements on critical path bridges and structures
  • Use of mechanically stabilized earth (MSE) walls instead of conventional cast-in-place (CIP) walls
  • Use of shorter ramp spans, which require fewer and shallower substructure elements (and less excavation), eliminate some curved girders, allowing use of standard rolled shapes and providing overall life cycle cost improvements.
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