Besides that, this hypothetical can be tested. Saskatoon is far north, and they do not do DST timechange. Meanwhile, Red Deer Alberta is a similar climate and

Besides that, this hypothetical can be tested. Saskatoon is far north, and they do not do DST timechange. Meanwhile, Red Deer Alberta is a similar climate and latitude, but does DST. So if people are concerned, winter morning accident rates in Saskatchewan could be compared.