Notices (car on side of road, etc.) that have a 'not there' or 'thanks' should allow tapping on either half of the whole dialog rather than just in the smaller buttons at the bottom of the dialog. It takes too much 'attention' to hit the button while driving.
Withhold Seth commented
This is elegant UI. Noice.
that is more like what i was thinking. great solution.
Ellsworth Chou commented
Agreed. Dialogs should NOT compromise the driver's attention to confirm or dismiss. I made a couple of mockups of how this might be presented: usefulbulk.com/waze/1cartouche_dialog.jpg, usefulbulk.com/waze/3cartouche_dialog.jpg