Dash Express collects current traffic speeds from other Dash owners and road sensors and other sources so that members of the network have all the latest data to give you the best directions.
You get up to 3 ways to get to your destination. You can get info from the Internet by using Yahoo local search.
Cellular and WiFi networks give constant access. You can also make a list of preferred destinations.
According to the Dash Express Web site, "The Dash Express wirelessly connects using both cellular and Wi-Fi radios. For cellular, Dash uses a cellular network composed of multiple carriers, so its coverage range is larger than any single national carrier."
Most importantly, voice guidance gives you the street for your next turn.
The only drawback of the system is it only gets 2 hours for each battery charge.