It is difficult to believe a world of driver-less cars, ride-sharing and other future transportation innovations but historically the evolution of the car has taken some even more interesting twists and turns.
In the late 1800s, Britain’s car laws required at least 3 people in the vehicle: the driver/engineer, passenger and a Red Flag person. Since horses could be afraid of these noisy vehicles, the Red Flag person would be 100 yards ahead of the vehicle and warn any horse carriages of their coming. Before the first Indy 500 race in 1911, most race cars had a driver and a mechanic who would help to look out for other cars. That mechanic become obsolete with the invention of the rear view mirror.
It is optimistic to believe a world of flying cars but very realistic to believe that the way we travel will change.