Ask the Attorney: Does the driver or company pay for injury insurance

Atty Haymond,

My son was injured when he was riding his motorcycle and a box truck must not have seen him and turned right in front of him. He is still in the hospital but the doctors are saying he will be out soon!
Since the driver was working is it him or his companies insurance reponsible for all the bills and his loss of time at work?

Alicia R