Sachin Gupta (42), his wife Rakhi (38), son Pratyaksh (12) and daughter Vrinda (3), residents of Loha Mandi area of Naraina in New Delhi, were killed, police said.
Gupta along with his family was going to Amritsar from Delhi to celebrate New Year at one of his relatives house.
A case against the truck driver has been registered, police said, adding that a PAN card helped to established identity of Gupta.