The government announced the introduction of covert speed cameras and unmarked police motorcycles in December last year as part of a package of road safety initiatives.
The cameras became operational in early April.
But the number of fatalities per week has increased since the covert speed cameras were introduced, union president Ian Leavers said on Wednesday.
"There is not a shred of evidence that they have had any positive impact in reducing fatalities on our roads," he told reporters.
"I fear that the Bligh government is becoming addicted to the revenue of speed cameras."
Mr Leavers said many police viewed covert speed cameras as "poker machines on wheels".
"Sure they rake in the dollars, however the deterrent effect for speedsters is non-existent."
Mr Leavers said the road toll was dropping before the introduction of the cameras.
Mr Leavers said many police viewed covert speed cameras as "poker machines on wheels".
"Sure they rake in the dollars, however the deterrent effect for speedsters is non-existent."
Mr Leavers said the road toll was dropping before the introduction of the cameras.
He said that in the 14 weeks to April 4 there were 3.7 deaths a week, while in the eight weeks to May 30 when the cameras operated there were 5.1 deaths a week.
"Covert cameras were only introduced at Easter, yet the road toll numbers have been down all year," Mr Leavers said.
He said the government should spend more on having police in the community to tackle all sorts of illegal behaviour, not just speeding.
"Increased police visibility will detect other offences and reduce the road toll as well as reduce other crime," Mr Leavers said.
Yes, I agree completely. More cops actually on the street. I don't have a problem with fixed speed cameras, would be even better if they had a sign saying "speed camera ahead" though like in new south wales. (I'm in Vic, hidden cameras everywhere)