7 deaths per billion passenger-miles. To put that into perspective, if walking had a death rate on par with passenger vehicles, a small village of 150 people go

7 deaths per billion passenger-miles. To put that into perspective, if walking had a death rate on par with passenger vehicles, a small village of 150 people going on a walking trip for 60 years, at 3 mph for 16 hours per day, should have seen one death in that time. I don't think we really quite appreciate how incredibly safe the modern world is.