Busses are generally much safer because they are bigger and heavier. Except in mountains. But I only encounter that on holidays and on holidays we take a lot more risks.
And I do think twice about taxis.
And I do think twice about taxis.
Assuming some utilitaristic equation for minimizing total injury, an AV bus probably won't swerve, and probably won't brake significantly except if colliding with a heavy or fast vehicle.