Would you please consider implementing such "timeline view" ?
It is soo useful to know what is ahead.
Tomtom shows it this way:
CoPilot this way:
Sygic displays a kind of progress bar that is already a good thing which you could do easily, adding color code would show congestions (for example).
On the top left, knowing the distance to the next resting zone or fuel station is a cool thing too which I was happy to have in other apps (I mean that this was not a gadget).