May be interesting here because walkable cities and transit directly reduce unnecessary deaths

Massachusetts consistently ranks as the safest state for drivers in terms of fatality rate, with only 4.9 deaths per 100,000 people. Its success is largely credited to stringent DUI laws … Urban density also plays a role – Boston’s congested streets and statewide lower speed limits in urban areas reduce the opportunity for high-speed crashes. The state also has a strong public transportation network, which decreases total vehicle miles traveled.