Self-driving car companies are "newbies" who could learn from railway companies, which have decades of experience with keeping drivers alert in vehicles that ke

Self-driving car companies are "newbies" who could learn from railway companies, which have decades of experience with keeping drivers alert in vehicles that keep moving without driver action. For example, locomotives have "dead man" switches to make sure the driver is still on the job. Japanese drivers are trained to point and vocalise. Why shouldn't the car drivers be required to call and point out every hazard whilst in autonomous mode? Maybe part of the problem is that the self-driving companies view their drivers as temporary measures, so choose to invest their resources into the machine component rather than the human component?