The school bus driver data is not for one driver- it is for the pool of drivers. In any case change the rules for self driving cars to only drive school bus routes and the ability to stop traffic.

But yeah self driving is a long way off and would need system changes. However, using it as a co pilot to warn of danger and monitor driver quality could be used to win some sales and reduction in insurance costs. Perhaps for older drivers, drivers with known marginal skills. So 10% share not 100%.