New York Police Commissioner Raymond Kelly said Sian Green, the British woman who had part of her leg severed in a collision involving a taxi in Manhattan, remains sedated in hospital.
Police said the taxi driver had been issued with a summons for being an unauthorised driver of the car.
Mr Kelly said the incident remains under investigation and the driver could face other charges.
More top news
The family of the police officer who was murdered in the Westminster attack have thanked those who were with him 'in his last moments'.
Thousands of fans gathered for a public memorial honoring famous mother and daughter who died just a day apart.
More sunshine this Sunday as British Summer Time begins.