I'm not sure that you can keep the screen mode the entire time. However, you can adjust the screen timeout accordingly. If doing this manually is not an option then use an app like Tasker to automate it for you. That way the screen timeout will increase every time the phone is in driving mode.I cannot find a setting (or settings) to do the following:
1) Keep the screen on when on the charger.
2) Keep the screen on in DriveMode (I'm guessing this could be the same thing)
Any help will be appreciated.
Thanks