According to the CDC these are the leading causes of death in the US.
https://www.cdc.gov/nchs/fastats/leading-causes-of-death.htm
Heart disease is number one. Cancer is 2. Accidents 3. Stroke 5. Four of the top 5 have some link to cars.
How much heart disease, stroke, or obesity, is caused by people driving everywhere instead of walking or biking?
How many deaths from slow ambulance response times? Cars allow suburbs to exist where people live far away from hospitals. People in cities have traffic. If people lived in densely populated places without cars and traffic, faster emergency response times would save many.
How much heart disease and cancer is caused by the air pollution from fossil fuel burning cars? How many deaths are caused by the natural disasters resulting from the climate impact of cars? Even electric cars are polluting the air with their tires, even moreso than fossil fuel cars do.
How much heart disease or strokes are caused by the noise pollution from cars?
How much heart disease or strokes are caused by the stress people experience while they drive and/or sit in traffic?
Cars are a major root cause of a lot of our public health problems. Not only do they violently kill people directly in vast numbers, they don’t get credit for all the deaths they contribute to indirectly.
We should dramatically redesign our transportation infrastructure so that people do not need cars. Reduce car usage to the point where they are only used when absolutely necessary. This will solve not just one, but several public health problems.