THE WA Government will reap almost $100 million in revenue from speed and red light cameras next financial year, a third more than just two years ago.

Budget papers estimate WA motorists will be slugged $97 million in speed and red light camera fines next financial year as WA Police rolls out more speed cameras to blitz offending drivers.

The predicted $97 million is up from $66 million two years ago and $95 million this year.

The $95 million expected to be earned by July 1 will smash the $82 million predicted in last year’s Budget.

There are 29 fixed speed and red light cameras across Perth and the WA Government recently spent more than $3 million on another four.

Police and Road Safety Minister Liza Harvey defended the huge increase in fines revenue, saying only drivers who broke the law would be penalised.

She said 100 per cent of revenue went into the Road Trauma Trust Account (RTTA) to make roads safer.

Mrs Harvey said the Government “has again confirmed its commitment to reducing trauma on WA roads by allocating a record $111 million for road safety initiatives in the 2015-16 Budget”.

Major projects to be funded from the RTTA include improvements to metropolitan intersections and regional roads as well as community and school-based education.

But $80 million will remain unspent, according to the Budget papers. Motoring lobby group the RAC said that was unacceptable. It comes as the road toll stands at 65 deaths for the year to date, up from 61 this time last year and 55 in 2013.

“The State Government must answer why this funding is not flowing sensibly to road safety initiatives across the state and why is $80 million forecast to be sitting idle,” the RAC’s corporate affairs general manager Will Golsby said.

Former police minister Rob Johnson — who initiated the plan to put all speed and red light camera fines into the RTTA — said it was disgraceful to have $80 million sitting idle while West Australians were being killed on the roads.

Australia Bureau of Statistics figures show the number of vehicles on WA roads is growing by an average 3.3 per cent a year.