It doesn't define that well what the options do in relation to their moral setting. Say two cars are driving straight at each other on a 1 way road where one side is a cliff drop off and the other side is lush grass: Does the self sacrifice mode mean that car would pilot itself off the cliff, and the self protection mode would swerve into the grass?
This becomes more fun if autonomous vehicles broadcast their ethical setting. Then you could overcome the prisoner's dilemma with something like tit-for-tat.
"Prioritize anybody else over myself only if they would prioritize me over themselves, given I prioritize them."