Yahoo! Car Navigation is a car navigation app that can be used with a smartphone. It allows you to find your destination on the map and get a route to it. You can also see the traffic status on the map, and get a traffic report. The app can also be used to find the nearest gas station, restaurant, hotel, etc. 

The app has a great user interface and is very easy to use. It supports voice commands and the navigation can be operated by the app itself. It can also be used to find out the distance to your destination and the route you need to take.