The MTA says it is once again looking into possibly adding platform barriers to subway stations across the city just days after a woman was fatally pushed in front of a moving train at the Times Square station.

The announcement came at a news conference in the Bronx Tuesday morning, where MTA Chair and CEO Janno Lieber said they formed a "track trespass working group" that will figure out how to deal with violence incidents like subway pushings and a growing number of incidents in which "people are just walking into the tunnels" and "getting onto the tracks."

But the idea comes with challenges, Lieber says.

"The platform doors are an idea that works in many places, but there's some special complexities in New York because of the age of our system, because of the location of structure, because it does interfere with ADA accessibility, because of the way that the subway system ventilates," he says. "All those things are real issues - that said, we're always looking for ways that can make the system safer."

In the days following the death of Michelle Go, who was shoved onto the tracks allegedly by a homeless man over the weekend, people have turned to social media to call for the implementation of platform doors, pointing to other cities that successfully have the safety measure installed.

Council Member Alexa Avilés, who represents Sunset Park and other neighborhoods in southwest Brooklyn, tweeted that the platform doors would save lives.

Mayor Eric Adams told reporters Tuesday that even he doesn't feel entirely safe riding the subway, after initially stressing that the system is safe following Saturday's attack.

Danny Pearlstein, a spokesman for the nonprofit Riders Alliance representing New York City bus and subway passengers, said that while the subway system is "statistically, overwhelmingly safe" and millions of people use it daily without trouble, violence like Saturday's killing hits a nerve because it feels it could happen to anyone.

"The mayor is showing he gets it, and he is sensitive to the way New Yorkers are feeling," Lieber said. "People don't feel based on statistics. They feel based on their personal experience and what they're hearing."

The Associated Press contributed to this report.