Mass Highway announced this week that work to the bridge deck and top support systems announced earlier this year will commence this week. All work will be done between the hours of 8pm and 4am. For the next seven nights, ‘spot’ work will be done on bridge joints, and motorists can expect minor delays. After October 21st, the deck/surface work will begin, which will necessitate bridge closures from 8pm to 4am Sunday through Thursday.  Traffic will be detoured to the O’Donnell/School Street Bridge during this time. All work is projected to be complete in 60 days.