> The truck... had to take scheduled breaks but drove mostly autonomously. There were zero “disengagements,” or times the self-driving system had to be suspende

> The truck... had to take scheduled breaks but drove mostly autonomously. There were zero “disengagements,” or times the self-driving system had to be suspended because of a problem These seems to imply short bursts of voluntarily shutting off auto-drive; I'd be curious to understand the rationale for when the two human copilots did so.