The reason no Queensland drivers have been fined by new school zone speed cameras

New high-tech cameras designed to catch Queensland drivers speeding in school zones have been branded a failure after no fines were issued in more than six months.

The high-tech hidden cameras behind school zone signs were rolled out in January this year.

"Some people just insist on speeding past schools, not taking directions from crossing supervisors," Transport Minister Mark Bailey said in January this year.

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"So we want these cameras to be fresh and effective as possible."

But in the six months since they've started, no fines have been issued.

Bailey is blaming technical problems during the testing period but said the result is not good enough.

"I was made aware last week from my department that there was a few issues around the issuing fines and a few technical issues, so that was unfortunate," he said.

The six cameras - which will be rotated through different schools - will now take a little longer to get online.

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Testing is still ongoing and the government said the new goal is to have the cameras ready for the start of term three on August 7.

"I'm informed that even the publicity around this has seen speed reduced in school zones so that's a positive outcome already," Bailey said.

The opposition has criticised the government over the cameras.

"Sadly this is the latest announcement in a conga line of failures to follow through, on behalf of the government," opposition leader David Crisafulli said.

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