Metro says more than 50 train operators who were certified — despite a safety watchdog finding they hadn’t met the agency’s training requirements — have now been provided the necessary extra training.

Transportation officials in San Francisco are investigating after video apparently showed a Muni metro train operator dozing off moments before a crash last month.

Metro Transit is making a big investment in light rail service. The agency just announced it’s approaching the highest number of rail operators it’s ever had, and that means more service. Right now, ...