Feb 17, 2012 - TPEG (Travel Protocol Expert Group) is a key feature of Toyota Touch Pro, the most advanced version of the new Toyota Touch multimedia system. It works with a DAB radio to provide more detailed, accurate and timely traffic information, coordinated with the vehicle's satellite navigation. This is all according to an article on 3d-car-shows.com.
Toyota Touch Pro makes its debut in the Toyota range as a standard feature of the 2012 Land Cruiser V8. It is also available as part of the Technology Pack option that is offered for the 2012 Prius T Spirit.
One advantage of DAB over analog FM is that there is more capability to transmit information such as traffic data.