fatalities probably track pretty closely with the overall number of injury-causing accidents, of which there are over 100k per year in this country where large

fatalities probably track pretty closely with the overall number of injury-causing accidents, of which there are over 100k per year in this country where large trucks or buses are involved. So, hypothetically, rolling out at 1% and closely monitoring all accident types seems like a fine plan imo. At least one type of fatality will be eliminated straight away --- no truck drivers will be dying :-)