Science tells us that the most key skill required for safe driving and crash avoidance is hazard perception (defined as the ability to detect, evaluate and react to visual cues). As a matter of fact, hazard perception skill is the only driving ability that has been shown by science to correlate to a lower crash risk for all drivers.
In one study, just 17 minutes of hazard perception training decreased collisions of young male drivers by 20% in their first year of driving. The United Kingdom system of car control uses a method of training that utilizes commentary driving.
A 10-year study of line of duty deaths in law enforcement in the UK--where commentary driving was vigorously applied--versus the USA., for every death in the UK there were 29 deaths in the USA.
The nine core DriveApps each advance a user's ability to perceive hazards, and in particular the DriveApps Commentary Driving App.