The incident occurred on the Madhubani four-lane bypass when the speeding SUV tried to avoid crashing into a biker, who was performing stunts.
The impact of the car hitting the divider was so hard that the Scorpio SUV flipped over five times.
Visuals of the incident showed the car completely crushing and the windows shattering. As the car flipped, one of its tyres broke the vehicle.
Several blood stains were seen on the SUV.
There were nine people in the car - out of which five died on the spot and four others have been critically injured, officials said.
The victims have been identified as Archana Thakur, Indu Devi, Mantarni Devi, Bal Krishna Jha, and the driver. The injured include Manohar Thakur, Srishti Thakur, Kamni Jha, and Devtaran Devi.
All of them are from Nepal, officials added.