This just in from MassDOT:
Motorists should seek alternate routes or expect delays heading into Leverett Circle during this afternoon’s commute. Motorists are proceeding cautiously over a plate that is covering a roadway defect on the ramp from Leverett Circle to I-93 Southbound. As motorists take the ramp at a reduced speed, this is creating a queue along the roadways feeding into Leverett Circle.
Massachusetts State Police will be assisting with traffic flow this afternoon. Work began last night to repair the road surface and work will continue overnight tonight. If the repair is not completed tonight, State Police will assist with traffic flow again tomorrow afternoon.
To help alleviate congestion, the I-93 Expressway Southbound HOV lane will open at 2:30pm today.
- Boston 
- Driving 
- Leverett Circle