To complex with far to many commands required for acquiring images and or recording saves whilst driving during traffic.
Road safety and driver distracting apps can place a person in personal life threatening danger. Upon what is always a dangerous place to have one's life hanging in the balance driving a car, truck, bus, bike or even a boat.
I would suggest the following
1. after setup menu is done in stationary or parked car.
2. colour coded push buttons, snap image ( saved) , record image ( preset 40 saved ), standby motion detector mode.
3. crash recording and horn activation recording modes; to save one minute before and three minutes after recording mode active.