Fatal car accidents in the United States spike by 6% during the workweek following the "spring forward" to daylight saving time, resulting in about 28 additional deaths each year. [1]
I would suggest that is correlated with sleep deprivation rather than lightness/darkness as following weeks evidently the rate returns to basically the same. That would not be true if the darkness was the issue.
1 = https://www.sciencedaily.com/releases/2020/01/200130144410.h...