The New York City Police Department (NYPD) has turned to drones to combat a growing trend of “subway surfing,” or riding on top of above-ground subway cars.

New York City Mayor Bill de Blasio appointed Jessica Tisch as CIO and Commissioner of the Department of Information Technology and Telecommunications (DoITT) on Dec. 5.

In a cease and desist letter sent Saturday, the New York City Police Department (NYPD) demanded that Google stop sharing the location of Driving While Impaired (DWI) checkpoints on its navigation app, Waze. In the letter, signed by department’s acting deputy commissioner for legal matters, Ann P. Prunty, the NYPD explained that under the city’s Vision Zero initiative its trying to eliminate all traffic fatalities and “paramount to the success of this initiative” is the police enforcing all DWI laws.