how many car trips per day in the us? must be billions. deaths per mile* per traveler should be the metric, not number of trips.
ps: safest method of transportation is the elevator.
edit:*mile traveled
how many car trips per day in the us? must be billions. deaths per mile* per traveler should be the metric, not number of trips.
ps: safest method of transportation is the elevator.
edit:*mile traveled