Route 9 and Cedar Street were quietly reopened to traffic on Monday morning, almost twelve hours before they were scheduled to be open. A few onlookers watched as some of the first cars travelled under Route 9, and a few drivers sounded their horns and waved appreciatively at the workers. Onlookers stopped by the site throughout the weekend to watch the work rapidly progress. Over a hundred people stood by as the bridge moved—ahead of schedule— down Route 9.
The secret to the incredibly fast bridge replacement was the strategy used by MassDOT and its engineers and builders, which was aimed firmly on a single goal: to provide the best possible customer service to road users and the community by building a long-lasting bridge, safely, efficiently, economically, and with the least possible impact to traffic and the community. To accomplish that, MassDOT pre-constructed the replacement bridge superstructure in a cloverleaf near the old bridge. Doing so kept a vast majority of the work outside of the roadway, nearly eliminating traffic impacts to Route 9.
As shown in the short movie below, once the new bridge superstructure was ready, MassDOT needed to demolish the old bridge and install new portions of the center pier and abutments. On Sunday morning, all preparations were complete. At 5:00 AM, four multi-axle machines called Self-Propelled Modular Transporters (or SPMTs) rumbled to life from their position underneath the new bridge superstructure. They moved in unison, carrying the 530-ton bridge from the cloverleaf onto the Cedar Street ramp. Then, at 8:15, the SPMTs’ many wheels rotated 90 degrees, and the bridge moved smoothly down the ramp onto Route 9 as the crowd watched, amazed. The wheels rotated again, and the bridge moved down Route 9, arriving at the pier and abutments at 9:30. The SPMTs held the bridge above the substructure until the early afternoon, when it was lowered into place.
Crews worked throughout the night to prepare to reopen the bridge. Temporary lane markings are in place and one sidewalk is open for pedestrians. Crews will continue to put the finishing touches on the bridge throughout the month, during off-peak hours. This work includes installing architectural pilasters, final paving and lane marking, completion of sidewalks, and installing signs.
2015 Moving Together Conference: Join Us! posted on Oct 10
MassDOT as part of the GreenDOT sustainability policy is pleased to invite you to the 2015 Moving Together Conference! The conference is scheduled as follows: Wednesday, November 4, 2015, 7:45 AM – 4:30 PM, Boston Park Plaza Hotel, 50 Park Plaza at Arlington, Boston This …Continue Reading 2015 Moving Together Conference: Join Us!
Haverhill: Bradford Rail Trail Groundbreaking posted on Oct 9
MassDOT Rail & Transit Division Administrator Astrid Glynn joined elected officials and supporters today in Haverhill to celebrate the Bradford Rail Trail groundbreaking. When completed, the 3,300 foot long Rail Trail will be located between the Basilere Bridge, the Comeau Bridge near South Elm Street …Continue Reading Haverhill: Bradford Rail Trail Groundbreaking
MassDOT Schedules Capital Conversations: Regional Meetings for Five-Year Capital Investment Plan posted on Oct 8
MassDOT is scheduling Capital Conversations, a series of public community meetings to solicit input on potential transportation projects to be included in the agency’s upcoming five-year Capital Investment Plan (CIP) for Fiscal Years 2017-2021. The meetings will be held in various regions throughout the Commonwealth …Continue Reading MassDOT Schedules Capital Conversations: Regional Meetings for Five-Year Capital Investment Plan