»In which there's no fire where there's smoke

This year, MUNI's Christmas list will include smoke detectors, so that they will no longer rely on work-of-mouth reports of smoke. I just found out that the Market Street tunnel was closed after various people reported smoke near the Embarcadero platform. The likely culprit: steaming and smoking brake pads.
In other MUNI news: the T-Third, N-Judah, J-Church, and 15-Third (that's right! the bus is back!) will all receive new schedules, and some return to normal.