I had a Motorola Razr M that would stay on when in its car dock. I now have an S4 and cannot find a way to have Google Maps on so I can monitor traffic as I drive. When I activate Google Maps the phone will time out and go to sleep. If I try hands free mode that does not keep the display active and If I try to use S-Voice it tells me that Google Maps is unsafe to use in hands free mode. I do not want to navigate anywhere just monitor the traffic and why would a map program be less safe than the equivalent in the navigation app?.