A bill requiring the Department of Transportation to compile more data about how people move through the city is high on the City Council’s agenda for the new year. More comprehensive data about traffic patterns would help New York City prepare for the one million new residents expected to arrive by 2025, council members say.

Supporters of the Traffic Information and Relief Bill, introduced by Council Member Gale Brewer, say the new data will provide a framework to consider traffic relief proposals like congestion pricing and parking changes.

“Whether it’s the growth in residents, the popularity of New York, the number of tourists, or just more people in the street, the fact is that people can barely move,” said Ms. Brewer, who represents the Upper West Side. “I don’t know yet if there are answers, but at least you need to have the data to look at.”

The Department of Transportation currently measures street performance only through what are called “output measures,” for example, the rate of repair for potholes and traffic signals. According to supporters of the bill, these indicators only paint part of the city’s traffic picture. More information about what kinds of vehicles are using the streets, as well as when they are driving and on which streets, is needed to assess and reduce traffic citywide. Currently, these statistics have been collected only in Manhattan below 60th Street.

“Some people see congestion pricing as a useful tool, and others see it as a sneaky way to tax people,” the executive director of Transportation Alternatives, Paul Steely White, said. “One of the things that Gale Brewer is trying to do with this bill is put such controversial charges in a more meaningful context, so that it becomes part of a larger overall goal of making our streets perform better.”

The bill, which will appear before the council’s transportation committee on January 25, so far has won the support of 17 council members and received no opposition from council members or community boards, partly because it is only about information gathering, not setting policy.

“Traffic is paralyzing parts of the city, particularly Manhattan south of 96th Street. Getting details about the location and the levels of traffic in the city would be beneficial,” said Council Member Jessica Lappin, who represents the Upper East Side.

A spokeswoman for the Department of Transportation, Kay Sarlin, said the agency does not comment on bills that are still being considered by the council.