The State Government should ban radar detectors immediately to prevent hoons from avoiding speeding fines, according to one of the State's top road safety experts.
Road Safety Council chairman D'Arcy Holman said research showed drivers who used radar detectors were more likely to routinely speed and crash.
He said every other Australian State banned the devices, which could be bought for as little as $200 to detect speed cameras from several hundred metres, giving a speeding driver time to avoid being caught.
WA Police have invested about $30 million into expanding and digitising its speed and red light cameras and are about to roll out new fixed cameras across Perth.
Professor Holman wrote to the Government on behalf of the council to implore it to ban the detectors.
"They (detectors) diminish the deterrent effect of safety cameras and hand-held radars and lasers allowing a proportion of drivers to remain undetected despite intentionally and consistently exceeding the legal speed limit," he wrote.
"Radar detectors not only fail to confer any net benefit but are detrimental to road safety efforts to enforce posted speed limits on all members of the community in a way that is fair and equal for everyone."
In October 2010, then Acting Police Minister Christian Porter said the parliamentary counsel was drafting legislation to ban radar detectors.
But Police Minister Rob Johnson said yesterday the Government no longer intended to introduce such laws.
He said the emergence of in-car navigation systems and mobile phone applications which could alert drivers to speed cameras meant the legislation was not necessary.
Police Union president Russell Armstrong said he was shocked the Government had abandoned its plan to ban detectors.
"We strongly supported that plan and anything which can improve road safety and make drivers safer is paramount," he said.
"It is an obvious thing that needs to be done.
"We shouldn't allow people to use things like this to get around speed cameras and speed as much as they want without getting caught."