Used well, it could serve as a powerful example of a city's ability to mine the collective knowledge of its residents for good.
One family's struggle to obtain evidence in the death of their son raises a number of questions.
Inside one New York group's campaign to lower speed limits from 30 to a much safer 20.
Twenty-three percent of the city's 2013 car-related fatalities occurred in just 5 percent of its neighborhoods.
It's a pretty awkward situation.
Right now, the city can't reduce speeds on pedestrian-heavy roads. But advocates are hoping to change that.
Officials hope it'll make streets safer. But pedestrians are often the victim of careless, speeding drivers.
A new group called Make Queens Safer is dialing up the pressure on Mayor-elect Bill de Blasio.