Currently there are two option buttons on the display, regarding a reported event. These are "Still there" and "Not there". But as your default setting is "Still there" in case of no action from the user, I think it would be better to have a single button, and that should be "Not there". In this way would be more easy for the user to push that button while driving. In the current situation sometimes I miss the right answer because the two buttons are close and I have to be attentive to the road while giving feedback.