This is the shocking moment a family car slammed into the back of a tanker on a busy motorway after a dad fell asleep at the wheel.

Mr Wang and his family were manoeuvring along the highway when he accidentally dozed off while driving in Zhejiang, China, on January 29.

Dashcam footage shows the driver veering into the other lane, hitting a tanker transporting hazardous chemicals.

Upon impact, the airbags deployed, and the windscreen shattered.

The driver and his wife reportedly sustained minor injuries in the incident.

He was reportedly fined for driving while fatigued.

Local media reported that the family of four had been relaxing at Dongqian Lake and were returning home.

A police report said the crash resulted in damage to both vehicles, with Mr Wang's car suffering severe front-end damage.

Authorities urged motorists to learn from the incident, plan their schedules wisely, rest adequately, and avoid driving while overly tired to ensure a safe and enjoyable trip.