According to state law, NYC can put speed cameras anywhere in the city, as long as they're within a quarter-mile of a school. As the city ramps up its use of these cameras, existing ticket data indicates three different types of locations used to position them.
Neighbors and commuters decry cameras like this one in Coney Island as money-making "speed traps," because they catch drivers exiting highways where there is no pedestrian crossing. On September 12, 2014, this camera near Shore Parkway issued 1,869 tickets in a single day, for a total of $93,450 in fines.
Cameras like this one in Sunnyside target busy crossings near some of the city's most dangerous boulevards. These locations are more common than the "speed traps" but tend to issue far fewer tickets. This camera at Queens Blvd. & 36th St. issues an average of 62 tickets per day it's active.
Almost half of the city's speed cameras are mobile — mounted on NYPD vehicles, they watch different spots for a day or two. Officials won't say how those spots are picked, though schools and community groups can make requests. Such cameras often issue just a few tickets a day; as a group they issue only 11.5% of all tickets.
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Speed Cameras in New York City

Officials won’t say where they’ve placed NYC's controversial speed cameras.
But based on where and when tickets were issued, about half of them appear to be in fixed locations.
The rest are mounted on city vehicles and rove from place to place.