Researchers have recommended that they shut up when a driver is distracted by the road situation around them.
Psychologists have determined that it takes almost half a minute to regain full attention after issuing voice commands in a car.
Google wants to introduce an 'Android Eyes Free' search interface to help users keep their attention on the road, not their phones.
CES 2014Android in the car has been a major theme of CES this year and ZTE has now upped its existing app.
The driver of one in every three cars you drove by today is using a smartphone to talk, text or surf the web, according to a new survey.
Steering wheels which vibrate to signal when to turn are being tested as an alternative to screen-based sat-navs.
Volvo has been trialling the latest 'road train' tech in Sweden, which effectively allows cars to drive themselves.
Ford has revealed its latest in-car entertainment and control systems, with its new MyFord tech including the option to have Twitter feeds read to drivers.
Forget about your plasticky driving wheel peripheral for your Xbox 360 or PlayStation 3, because Ferrari just upped the game, releasing what is arguably the greatest driving simulator yet known to man.