The Queensland Police are cracking down on motorists who are disobeying safety rules on the road.

Authorities say that many motorists go to extreme lengths to break the laws when it comes to wearing a seatbelt.

Police say there have been incidents where motorists buckle up their seat belts before getting into the vehicle and they sit on top of the seatbelt to avoid the safety alarms going off.

About 40 per cent of people killed or seriously injured last year were not wearing seatbelts.

In other police news, the newly installed mobile phone cameras have caught more than 2,000 motorists using mobile phones in a week, compared to the 6,100 they catch per year.