It is a pet hate for most drivers, but traffic congestion due to prolonged roadworks could be about to ease in the Perth CBD.

Mapping technology which promises to significantly reduce traffic in Perth — and slash the cost of infrastructure projects — is being rolled out by the City of Perth.

The Smarter Planning Perth system identifies public works projects in close proximity and notifies their project managers of the opportunity to share resources, potentially saving them time and money.

The idea is to prevent duplication — such as when a road is excavated and re-laid for one set of works only to be dug up shortly after for another project.

City of Perth CEO Martin Mileham said the public would benefit from fewer roadworks, and it is hoped long term traffic disruptions, such as those on Wellington Street in the CBD would be minimised.

"Wellington Street was blocked by three consecutive pipe bursts, and those issues, probably at least one of those might have been averted by better sharing of data," he said.

"So I'd say that what we're looking at is a reduction in the number of times we need to enter into streets in particular."

Mr Mileham cited duplicated work at Elizabeth Quay as another example.

"There was excavation done twice that could have been done once," he said.

"In hindsight we think that won't happen in the future."

Ratepayers and consumers to benefit

The system uses red diamonds to indicate where works projects overlap and resources can be shared. ( ABC News: Irena Ceranic )

The system currently has five organisations on board including the Perth council, Western Power, ATCO Gas Australia, the Water Corporation and Main Roads.

Each organisation's project appears on the map in an assigned colour: for example blue is used to identify Water Corporation works, and a red diamond appears when projects overlap.

Mr Mileham said he expected the technology to save the City of Perth millions of dollars in the future.

ATCO Gas Australia President Pat Donovan said the utility's cost savings would ultimately be passed on to consumers.

He estimated a recent collaboration with Water Corporation to replace gas and water pipes at the same time on Rokeby Road in Subiaco slashed the cost of the gas project by thirty per cent.

"Our experiences have shown that there are significant benefits that flow to all parties," he said.

"Coordinating our schedules has enabled us to reduce the amount of time on site, and also remove and reduce redundant duplication of effort."

The City of Perth has conducted a six month pilot of the system but plans to continue using it in the future.