The closest thing I found to what I need is waze, except that I need to turn off the screen while driving my motorcycle, and then the iphone stops transmitting to bluetooth, unless I push the bluetooth button on my helmet, then it leaves the connection open for about 20 seconds, but it's a pain in the ass.
Anybody have a solid solution? And I mean really solid, cuz it's dangerous when I pull out my iphone while driving my motorcycle :-(
I recently noticed that if I use Google Maps turn by turn directions with my Altima Coupe, the directions will play through Bluetooth. Every time a turn is announced, google maps tricks my car into thinking its making a hands free Bluetooth call. I have yet to get Bluetooth working with the Apple Maps. Maybe Apple will add this feature in iOS 6.1??
Try playing music over Bluetooth while navigating in maps. It will then establish A2DP connection (which is constant) instead of headset connection. You can then switch off the music but A2DP connection will remain. I have this working perfectly in my car via Bluetooth.