Great idea, it seems you are going in a good direction! However, I do think asking users to keep in mind 4 (not that intuitive) gestures with 2 variations each (leading to a mental load of 8 actions) is too much... I think we could mix a couple of big touchable areas there, more graphic and distinguishable actions. Something easily distinguishable from a driver's glimpse.
Great idea, it seems you are going in a good direction! However, I do think asking users to keep in mind 4 (not that intuitive) gestures with 2 variations each (leading to a mental load of 8 actions) is too much... I think we could mix a couple of big touchable areas there, more graphic and distinguishable actions. Something easily distinguishable from a driver's glimpse.