Some signals needed attention on the Green Line Extension

The day on the brand new Green Line Extension started bright and early and full of buses: The MBTA announced at 5 a.m. it couldn't run trains on the tracks, not because they were out of gauge again but because the signals weren't working near East Somerville. But the bustitution only lasted until 5:17 a.m., when the T updated those darn signals were signaling again.