I'll plug Strong Towns here first.
https://www.strongtowns.org/
These types of fatalities will continue to happen until we get serious as a country and reject the speed first automobile transportation network we've allowed to happen over the last 100 years. There are plenty of easy to emulate transportation networks in other countries with far fewer crashes, injuries, and cost than our auto-first system.
But we have to let go of our grip on the steering wheel and make some hard decisions in our cities that allow for far safer walking, biking, jogging, etc. by physically separating cars and people, changing laws to put drivers at fault for crashes, slowing speeds down in cities, charging drivers of cars and trucks for their real cost (not just the highway use tax) etc.
Strong Towns is pushing for a rethinking of our cities from the ground up, and part of that rethinking is designing cities for the people living and walking there, not just car traffic.