TomTom has unveiled a Go series of satnavs with more interactive features and smartphone connectivity.TomTom SA says the new series will launch locally in September but prices have not yet been confirmed.The Go is available in three screen sizes – 11, 13 and 15cm. UPGRADED FEATURESNew features include an interactive 3D map and 'lifetime' traffic updates. Drivers can zoom in and to find and explore places on the map with their fingertips and tap on the map to get an instant route to a destination. The traffic service pinpoints where delays start and end. There’s also a quick search function which starts finding destinations as soon as the driver starts typing.The series units are called the Go 400, 500 and 600 (screen size) and all have the same features. Prices in the UK start at the equivalent of R2400 for the Go 400, R3700 for the Go 600.The Go smartphone Connected series allows traffic and speed camera updates by connecting via Bluetooth.