Dead train reported at Ashmont at 7:13 a.m.
Also reported: Signal problems on the Reservoir Line and a wicked late train on the Franklin Line. " Free hot chocolate on board?" one commuter freezing at Walpole asks hopefully.
UPDATE: An Orange Line train froze to death at Sullivan Square around 7:40 a.m. An inbound train, of course. It was followed in quick succession by a dead inbound Mattapan trolley at Butler. Not long after that, an inbound B trolley refused to leave Boston College. And then the drawbridge at North Station got stuck or something, delaying inbound commuter-rail trains.