Who pays the blood money (diyya) for accidental killing: the company or the driver, if the deceased was at fault in the traffic accident, and the other party was a driver of a worker transport bus?

If a bus driver transporting workers commits an error that leads to death, he must perform the expiation of fasting for two consecutive months, and his 'aqilah (male relatives on his father's side) must pay the diyah (blood money) to the victim's heirs. The company is not obligated to anything unless it volunteers to pay the diyah. However, if the deceased was the one who committed the error and violated traffic laws, then there is no diyah for him, nor is there expiation upon his killer.