A Local Law to amend the administrative code of the city of New York, in relation to requiring authorized emergency vehicles to have an emergency signal device that emits pulsating, low-frequency tones

This bill would require all authorized emergency vehicles in New York City to be equipped with an additional siren, often called a rumbler, which emits a pulsating, low-frequency tone between 175 and 400 hertz to create vibrations that alert pedestrians and motorists to the presence of the emergency vehicle.

Official summary of legislation · NYC Council