3) TrafficRep [10]: The TrafficRep device connects to the in-
vehicle navigation system, supplying it with current traffic
conditions. From user's (driver) perspective. a user only
interacts with the in-vehicle navigation system posing
queries. TrafficRep device disseminates sensed traffic
information to other vehicles. They act independently of
other vehicles based on locally available information in order
to decide what and when to disseminate. Each TrafficRep
device maintains an estimate of the travel time on all the
links. On receiving disseminated traffic reports, the vehicles
update their travel time estimates. The widespread
deployment of WiFi hotspots and wide area cellular
networks opens up the exciting possibility of interoperability
between these types of networks.