I knew someone who used to do that as a side job. I recall you can sign up for as many or as little of routes as you want. I can't recall if it was hourly or based on quantity of content. I remember it was a lot of hard drive turn around where Google would mail him disk drives, then drive around recording on them, then mail them back. I'm sure since then everything can be uploaded to the cloud.

For commercial driving it's also better to have a "technician" onboard just in case something goes wrong. If/when it does it's also useful for lawyers and insurance companies to point a finger at an individual rather than a large corporation or vehicle manufacturer. Lot less liability for everyone.

Makes me think about freight trains and airplanes. A lot of the transportation is done by a computer/autopilot but still need to someone around for the finer things.