Post Content

Shoukry Headshot Mar2010
Posted by Shoukry Elnahal, Deputy Chief Engineer for Bridges and Tunnels

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.

 

Written By:

Recent Posts

Bike Plan: MassDOT to Join Lawrence Ciclovia posted on Aug 18

Bike Plan: MassDOT to Join Lawrence Ciclovia

MassDOT has announced that it is participating in the Lawrence Ciclovia event being held on Sunday, August 20 from 3 PM to 7 PM. Parts of Essex and Common Streets will be closed to cars but open to the public to enjoy biking, walking, skating,   …Continue Reading Bike Plan: MassDOT to Join Lawrence Ciclovia

Springfield: I-91 Viaduct Public Meeting Set posted on Aug 18

Springfield: I-91 Viaduct Public Meeting Set

MassDOT has scheduled a Public Information Meeting for the I-91 Viaduct Rehabilitation Project in Springfield as follows: Wednesday, September 13, 6:30 PM to 8:30 PM, One Financial Plaza, 3rd Floor Conference Room, 1350 Main Street, Springfield Please join MassDOT at a public information meeting for   …Continue Reading Springfield: I-91 Viaduct Public Meeting Set

Baker-Polito Administration Celebrates Framingham Commuter Rail Lot Ribbon Cutting posted on Aug 17

Baker-Polito Administration Celebrates Framingham Commuter Rail Lot Ribbon Cutting

The Baker-Polito Administration along with state and regional transit officials today celebrated the ribbon cutting of the Framingham Commuter Rail Station Parking Lot. Management of Framingham Commuter Rail Station, including the station’s parking areas, was transferred to the MetroWest Regional Transit Authority (MWRTA) in a   …Continue Reading Baker-Polito Administration Celebrates Framingham Commuter Rail Lot Ribbon Cutting