A hoon driver who fought a reckless driving charge after being caught doing 105km/h over the limit has been convicted in the first legal test of the new speed cameras.

The Morley man was one of two drivers charged with reckless driving after a speed camera recorded his Ford Falcon GT sedan doing 195km/h and a Ford Focus sedan doing 207km/h in a 90km/h zone on Tonkin Highway in Embleton last year.

Police said the camera photograph showed the cars side by side and they appeared to be racing.

Insp. Mark Ridley, at infringement management and operations, said yesterday the case should serve as a warning to motorists.

It showed police could now tell who was speeding even if there were several vehicles in an image and passing the camera at the same time.

The slant beam radars used in the old technology could not differentiate between vehicles in close proximity.

The Ballajura man, then 32, caught doing 207km/h pleaded guilty at his first court appearance and was fined $750 plus costs and had his licence suspended for six months.

A Morley 45-year-old pleaded not guilty, saying that only the other driver in the photograph was breaking the speed limit.

He changed his plea to guilty on Tuesday before a trial after police gave his lawyers expert advice from speed camera manufacturer Vitronic.

The manufacturer said the new cameras measured and recorded the speed of every vehicle that drove past, even those not exceeding the limit.

The cameras could differentiate between cars in different lanes because the technology enabled the laser to measure the vehicles' distance from the camera and the speed they were travelling in relation to each other

When a photograph is taken of a speeding vehicle a box is drawn on the car the laser is focusing on - in this case, there was an image tracking the GT sedan.

Insp. Ridley said there was also corroborating evidence about the headlights that indicated speed.

"There is no doubt we can capture two cars at once and we will fight any challenges, especially for hoon matters," Insp. Ridley said. "It was extremely dangerous driving."

The man was fined $1200 and lost his licence for 15 months. The court ordered him to pay the $2514 cost of getting the Vitronic evidence.

The West Australian

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