SUNA Phase 2, due to go live in the third quarter of 2010, will add speed data received from "thousands" of vehicles in order to deliver more accurate reports of traffic congestion.
The improved service will not involve any additional charge to users.
SUNA Traffic Channel provides up to the minute road information, piggybacking the signal onto commercial FM radio broadcasts. The data can be processed by appropriately equipped GPS navigation systems, and some models will automatically re-route around bottlenecks rather than simply alerting the driver.
More than 30% (by volume) of the GPS systems being sold are SUNA capable, and the system is also available on built-in navigations systems from Nissan and Ford, as well as on some smartphone navigation apps.
Where is the improved data coming from? Please read on.
Increasing the number of probe vehicles by adding taxis, road service vehicles, courier vans, coaches and GPS-equipped private vehicles will provide more detailed coverage and higher precision.
"SUNA Phase 2 will deliver tangible improvements to the accuracy and level of coverage currently provided to motorists. Drivers will have greater understanding and control of the road conditions around them, delivering a safer and more enjoyable motoring experience," said Adam Game, CEO of Intelematics Australia, the RACV subsidiary behind the service.
"Our commitment to motorists remains unchanged, and with SUNA now available to more than 95% of the Australian main metropolitan population, we believe we are now in the best position to deliver the next phase of the service," he added.
That 95% refers to Adelaide, Brisbane, Canberra, Gold Coast, Melbourne, Sydney, and Perth. SUNA Phase 2 is currently being tested in Melbourne and Sydney.