A group of street safety advocates braved the cold yesterday outside Mayor Bill de Blasio’s inauguration and received an impromptu visit from Polly Trottenberg, de Blasio’s pick for transportation commissioner.

A total of about 15 people, organized by Make Queens Safer and Make Brooklyn Safer, gathered on Broadway outside City Hall yesterday, holding signs and handing out yellow “Vision Zero” stickers and pamphlets. The group held a large yellow banner aloft. It read, “Vision Zero Begins Today — Congratulations Mayor de Blasio.”

The big banner attracted Trottenberg’s attention. “I saw you as I was walking across the street,” she told the group, adding that she hadn’t known about the demonstration and was on her way to the inauguration. Before heading to the ceremony, she stopped and spoke with the parents of traffic violence victims and advocates who asked her to put the campaign’s street safety promises into action.

Amy Cohen, whose 12-year-old son Sammy was killed by a driver on Prospect Park West, asked Trottenberg if the administration would prioritize automated traffic enforcement in its Albany agenda. (De Blasio’s campaign platform included a bid for local control of speed and red light cameras.) “We are ready to all go to Albany with you,” Cohen told Trottenberg. “We are here to do whatever it takes.”

Trottenberg didn’t offer specifics, but emphasized the administration’s commitment to street safety. “Working with the mayor’s office and his team that will be up in Albany, we’ll be having some input into shaping what his agenda’s going to be up there. He’s obviously got a lot of things he needs to get done in Albany, so I can’t tell you yet where this will fit in,” Trottenberg told Streetsblog. (De Blasio’s top priority in Albany is an income tax on the wealthy to fund universal pre-kindergarten.) “At the mayor’s announcement yesterday when he talked about transportation, Vision Zero was the first thing he mentioned. It is on the top of his agenda and mine,” Trottenberg said.

Trottenberg added that she is still searching for an apartment in New York and would be moving from Washington to officially start work by the end of the month. “As soon as I’m here, you’re definitely one of the first groups I want to meet with and talk about what our agenda’s going to be,” she told the parents and advocates. “I want you all to come in, and we’ll sit down and strategize.”

“It sounds like we need some home-rule help in Albany,” she said. “I think a lot of things are going to need a group effort.”

Trottenberg noted that New York is not the only city struggling with state control over transportation policy. “I’ve seen it from the federal perspective in every big city I can think of. There’s a whole clash of city-state issues,” she said, hinting that she has tired of tackling the problem from above with federal policy. “The climate in Washington right now has been frustrating in terms of getting any federal action,” she said.

I asked Trottenberg how her federal policy experience will translate to the local level here in New York. “As number three at DOT, I have had some experience in running a big agency, but there’s no question I’m going to have a learning curve here,” she said, adding that her experience with the political strategy behind policy shifts will be valuable in New York. “It’s the opportunity of a lifetime,” she said of heading NYC DOT.

Amy Tam, whose 3-year-old daughter Alison Liao was killed by a turning driver in Flushing, was happy Trottenberg stopped to speak with them. “We didn’t expect it at all, so that was a really nice surprise,” she said. “She expressed how much she wants to work with us, so that gives me hope.”

Tam said she and her husband, Hsi-Pei Liao, have met with other families who have lost children to dangerous drivers, including the mother and sister of Luis Bravo, who was killed by a hit-and-run driver in Woodside, and the father of Noshat Nahian, the 8-year-old killed last month by a tractor-trailer truck driver operating on a suspended license.

Trottenberg wasn’t the only official who stopped to speak with the group: Congresswoman Carolyn Maloney and Council Members Brad Lander and Mark Weprin also stopped by before heading in to the inauguration.