In the news, there is talk of electric cars being heavier than gas cars due to the weight of the batteries. Heavier and deadlier to outsiders, like other cars and pedestrians, in an accident.
If this is the case, we will need to take the next technological step. Self driving cars, or at least more collision avoidance technology in human driven cars.
Another change could be smaller, lighter cars and lower speeds. Sorry, less giant SUVs. Either that or more folks not driving cars.