Interesting and hopefully engineers can continue to improve on cars form factors in this regard. But the main reason fatalities are up is simple and obvious: cell phones and increasing use of mind and mood altering drugs in all their forms, of which legalization of marijuana has played no small part. The impersonalization and disconnectedness of modern life, and reduction of family and community connections, has also led imo to general recklessness and disregard for humanlife by a certain percentage of drivers who needlessly risk the destruction or maiming of others in street racing or other criminal recklessness so they can get a short lived adrenaline rush. E.g. https://www.bbc.com/news/world-us-canada-56154795