No any type of driving mode is the worst! The phone should always operate the same! The most distracting thing when driving is trying to figure out a whole new unfamiliar interface and having to fight with it to get it to do what you want it to do. Your phone should always work the same way
Maybe true for just dumping you into it unexpectedly, but once you do know how to use it, it is a much safer interface.
I much prefer having the podcast or music app integrated into the map interface with big buttons. The alternative is spending a lot more time with eyes off the road to switch apps and hit small buttons.
If I need to get to the normal interface when stopped, it is just a swipe away.