POINT-TO-POINT speed cameras will go live on Forrest Highway from September 6, with millions of dollars in fines each year expected to be generated by the technology.

Extensive testing of the cameras began last October and found almost one-third of 500,000 drivers monitored over three months were speeding.

About 10 per cent of them — 16,500 — were speeding by more than 10km/h.

Road Safety Minister Michelle Roberts said yesterday an advertising blitz would be held before the cameras were turned on to warn drivers to think about their speed.

“This education campaign, which will include TV, radio, digital ads and billboards, begins two weeks prior to enforcement and gives drivers plenty of notice if they speed on the Forrest Highway they will be caught,” Mrs Roberts said.

The cameras are on both sides of a 27km stretch between Lake Clifton and Binningup.

They capture the registration details and times that vehicles enter and leave the zone.

The data is used to calculate the vehicle’s average speed.

Camera Icon One of the 'point-to-point' cameras on Forrest Highway. Credit: PerthNow

The cameras can detect if a car is speeding when it enters or leaves the zone and infringements can be issued regardless of the average speed.

“The McGowan Government is committed to reducing road trauma on WA roads, and speed is a significant factor in fatal and serious injury crashes,” Mrs Roberts said.

“The average speed safety camera zone on Forrest Highway is an effective way to slow drivers down and ultimately save Western Aust- ralian lives.”

Mrs Roberts said Forrest Highway had been selected for the first point-to-point cameras because of the high number of fatal and serious crashes.

Between 2009 and 2016 there were 183 crashes in the 27km covered by the cameras.

Eight people died and 22 were seriously injured.

All revenue raised from the cameras will go to the Road Trauma Trust Account which is used to fund road safety initiatives such as improving road design, extra police patrols and safety and awareness campaigns.