TomTom claims the new HD Traffic service is the "world's most accurate and detailed", as it combines both live incident data, and real time flow of traffic from multiple sources. It promises Australia-wide coverage in both metro and regional areas.

A live data connection (via a built-in, non-removable SIM card) in the new range of TomTom GPS units delivers information from state traffic authorities, while data is also automatically collected from TomTom GPS users. The HD Traffic service promises live traffic updates to users every two minutes.

"Traffic congestion has a major impact on society and health, and is known to cause stress," said Chris Kearney, TomTom's vice president for Asia Pacific. "We don't have the complete solution, but we have some tools that will help with traffic congestion."

"Traffic information is only of value if it's timely and fresh, and HD Traffic provides drivers with the best routing information, and the most accurate and detailed live traffic information available."

The TomTom service is the first of its kind in Australia. The , used by competitors Garmin and Navman uses an FM radio signal to provide updates -- the same way you receive regular FM radio in the car. It's also limited to mainland capital cities.