NHTSA stats show increased traffic fatalities following the time change every year
I’m sure this is true and can be attributed to DST, but do we know if this would be worse than traffic fatalities caused by commuting in the dark during winter months without DST?
Interesting question. One would have to first account for changes in light conditions in the morning, and then changes in light conditions in the evening.
Daylight savings time can affect the heart, according to the American Heart Association[1].