I-95 (Rte. 128) Add-a-Lane & Rte. 1/Rte. 1A Interchange

Project Overview:

This project is another of MassDOT’s Route 128 “Add-a-Lane” series of projects to widen Interstate 95 from Braintree to Needham completed by SPS. It included replacement of the heavily-traveled Rte. 1 and Rte. 1A bridges over I-95, including both shoulder and median widening of I-95 to accommodate an additional travel lane.

In addition to the bridge work, SPS self-performed construction of four noise walls, totaling over 6,000 linear feet. Other improvements included the installation of overhead signs, drainage, detention basins, water quality swales and new pavement on over five lane-miles of interstate

Key Challenges Overcome:

300’ +/-?? temp bridge carrying route 1 over I-95 during construction

Interesting Facts / Figures

This project was phase 3 of 6 in a $315M MassDOT project to widen 14.3 miles from six lanes to eight lanes.