Traffic information based on trusted group behaviour

A method of providing real-time traffic information entails defining a trusted group of mobile devices traveling to a common destination, obtaining traffic data from the mobile devices of the trusted group, and determining traffic information based on the traffic data for a plurality of routes to the common destination. This enables a mobile device user to determine which one of a plurality of alternate routes to a destination is optimal given prevailing traffic conditions. Since the data derives from a trusted group, unlike aggregated data, it is more likely to be considered reliable by the end user.