Traffic engineers hope they have found a simple solution to peak hour traffic snarls at the Britannia Roundabout in Adelaide.

They have devised a design which has two roundabouts.

They hope the corner will become safer and simpler for northbound traffic wanting to turn right into Kensington Road.

There will be a second roundabout put at the end of Dequetteville Terrace to help traffic turning right into Wakefield Road.

The road project will cost $3.2 million and require removal of some trees, but none of them from the parklands.

It is hoped the work will be completed by early next year.

Premier Jay Weatherill said it was a creative solution for a corner long complained about by Adelaide motorists.

"Engineers have devised a solution that does not require costly underpasses, overpasses or new roads that would cut a swathe through the parklands," he said.

"The redevelopment will reduce the number and severity of crashes by turning the complex five-way roundabout into a much simpler configuration using two smaller roundabouts.

"This is an intersection that's been driving South Australians crazy for decades and what we've come up with here is a solution that is simple, it's cost-effective, it has the benefit of saving a whole lot of gum trees in this area, preserving our parklands and at the same time making this a safer intersection."

The Government said signage on the approaches would tell drivers which lane to be in for their planned journey.

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South Australian Department of Transport director of traffic management Paul Gelston said there had been more than 300 road accidents at the notorious roundabout in the inner eastern suburbs between 2008 and 2012.

Mr Gelston said motorists could look forward to an easier drive through the area.

"The solution gives drivers more space and more time. It removes some of the very tricky manoeuvres that are currently required of this roundabout," he said.

The RAA says the redesign would go a long way toward improving traffic flow through the intersection.

Manager of road safety Charles Mountain said it would not encroach on parklands, which had been a sticking point with previous plans to alter the roundabout.

"It maintains the best aspects of the current roundabout in that it keeps traffic moving reasonably freely outside of peak periods but will address the two dangerous manouvres that most motorists who use it are most familiar with, that's entering from Wakefield Road onto the roundabout and also travelling north from Fullarton Road," he said.

The SA Opposition said it would believe the Government's announcement when the upgrade actually happened.

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Opposition Leader Steven Marshall said the latest plan differed vastly from an earlier one.

"It's very difficult for us to understand how a proper solution back in 2006 costing $100 million could now morph into a proper solution for motorists here in SA that only costs $3.2 million," he said.

"Now we know we've got a tough budget coming up this Thursday but it looks to us that the Government's gone for a very cheap option."