Mayor Bill de Blasio suggested last week that one solution could involve the removal of the pedestrian plazas where the women, and many people dressed as cartoon characters or superheroes, pose for the photos and ask for a tip in return. “I don’t like the situation in Times Square,” Mr. de Blasio said last week, “and we’re going to address it in a very aggressive manner.”

A mayoral task force is examining the issue, which has vexed city policy makers because most of the activities that have drawn scrutiny are protected by court rulings as well as the state and federal constitutions. The task force will report on its recommendations on October 1, Karen Hinton, a spokeswoman for the mayor, said.

In a briefing with reporters at Police Headquarters, the chief of department, James P. O’Neill, said the new unit would follow the neighborhood policing model, which is being tested in four precincts and is set to expand to more than a dozen more in the coming months. “The same people, on the same post, during the same time period, every day,” he said. The new unit would double the number of officers assigned to Times Square to about 100.

Times Square was not one of the areas slated for the next expansion of the policing model, he added, but that it seemed to be a natural fit “as this issue came up over the last three or four weeks.”

The unit, whose official name has yet to be determined, will address “crime and quality-of-life issues surrounding the city’s No. 1 tourist destination,” the memo said. The officers are expected to begin their patrols as early as October, Chief O’Neill said.