In the surveillance video, the woman can be seen walking down the stairs at the city's Embarcadero station on April 12 when she tries to get on the Muni train as the doors are closing. It seems as if her hand gets stuck in the door as it is closing. She can be seen talking to a worker standing on the platform just feet away, but the train starts moving and she is dragged off the platform and under the train.
The woman was reportedly injured, but officials have not said how seriously.
The video was first acquired by the San Francisco Examiner.
"Paul Rose, Spokesperson at the San Francisco Municipal Transportation Agency, said in an interview with San Francisco," The door is closed with less than a half inch of space between the door and the door jam when she reaches her hand in the door. " ABC station KGO.
The SFMTA, which operates the train line, recently purchased new Muni train cars, including the one involved in the accident.
"These trains and doors are safe," Rose said. "They operate as designed, they were certified by the CPUC [California Public Utilities Commission] and they've been through six months of testing before we put them in service."
The CPUC has said that it will investigate the doors and pin system, according to KGO.
"I heard shouting behind me, and I did not know what was going on, but there was a commotion and I was scared honestly," Eyewitness Will Hayworth told KGO. "She was trying to keep up with this train and this new Muni car was dragging her by her hand … People were shouting," Stop! " and a couple of people were banging on the car even, shouting 'stop, stop, there's somebody trapped.'
"She was keeping up, but still being dragged," he continued. "The car did not slow down at all. Basically, it did not seem like the operator had any idea of what was happening. "
Matt Haney, the supervisor from San Francisco District 6, which includes the Embarcadero region, said this is not the first time he heard complaints about Haney said: "There is a clear need for some different sensors on the doors or some way for riders to be able to see it differently," Haney said. that some of the operators actually flagged that this was a issue and they were concerned about it. "
ABC News contributed to this report.