Traffic alert: Overnight roadwork will prompt detours in area Roadwork on Central Mass. highways will impact motorists this week: - On the Massachusetts Turnpike, various lane and ramp closures are taking place each night this week, through 5 a.m. Friday, in the area of Exit 96 in Millbury (Old Exit 11). - On Interstate 290 in Worcester, the on- and off-ramps at Exits 20 and 21, at Burncoat and Plantation streets, will be closed from 9 p.m. Thursday until 5 a.m. Friday. Detour signs will be in place. -