Lead foot motorists will find it harder to avoid speeding fines, with authorities planning to install "average speed" point-to-point cameras on several major south-east Queensland roads.

The cameras will be installed along a 30 kilometre, 110km/h stretch of the Pacific Motorway, between Beenleigh and Gaven; nine kilometres of the Gateway Motorway, between Nudgee and Deagon; and the Toowoomba Second Range Crossing.

Average speed cameras will be installed on the Pacific Motorway (pictrured), the Gateway Motorway and Toowoomba Second Range Crossing. Credit:Alamy

The system records car registration plates at fixed points on a section of road and calculates the speed to travel between the points, so traffic fines can be issued.

People driving unregistered or stolen vehicles or unlicensed drivers could also be caught using the technology.