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.
MBTA Orange Line Service Alert: Suspension of Weekend Service August 1-2 posted on Jul 29
The MBTA has scheduled necessary track maintenance activities on the Orange Line for this weekend, Saturday, August 1st and Sunday, August 2nd. Weekend service will be suspended between Forest Hills and Ruggles Stations. During the suspension of service, work crews will remove and replace rail …Continue Reading MBTA Orange Line Service Alert: Suspension of Weekend Service August 1-2
Longfellow Bridge: August Closures Update posted on Jul 29
The Longfellow Bridge Rehabilitation Project moves forward with demolition work that will require bridge closures. MassDOT’s contractor, White-Skanska-Consigli JV (WSC), will periodically close the Longfellow Bridge to all vehicular traffic beginning on Saturday, August 1 through Friday, August 21. The closures are necessary to safely …Continue Reading Longfellow Bridge: August Closures Update
Green Line Extension Community Outreach Event posted on Jul 29
The Green Line Extension Project team including contractor Barletta Heavy Division this week participated in a touch-a-truck event with the Power Kids summer enrichment program in Medford. Approximately 60 youth from the Power Kids program grades K-11 had an up close view of the construction …Continue Reading Green Line Extension Community Outreach Event