The couple was returning to their home in Nihal Vihar after attending a wedding ceremony, when their motorcycle was hit from behind by the truck on main road of ST Block in Mongolpuri.
The accident happened around 12.30 AM, said a senior police officer.
Ashish, husband of deceased Arti, sustained injuries in the accident and was admitted to hospital for treatment.
The truck hit the motorcycle and the woman was thrown on the road. She was crushed under the wheels of the truck whose driver sped away after hitting the bike, officer said.