Earlier quoted context omitted.
> In the US at least, the top killer of drivers are trees on the side of the road. Do you have a source on that?
> From 2016 to 2018 an average of 19,158 fatalities resulted from roadway departures, which is 51 percent of all traffic fatalities in the United States. https://highways.dot.gov/safety/RwD
Road departure fatalities are high because of head-on collisions, not because there is an epidemic of people crashing into trees along the side of the road. If you follow the links on the cited page, they clearly show that head-on crashes result in more fatalities than tree+utility pole crashes.