Tell me how this won't be indirectly sexist.
For starters how much testing on women has there been? Generally speaking tests are done on the default human body in science: the male one
(Read 'invisible women' for how this consistently works against women for having different physiology)
Then since women are more likely to work in caring professions involving shift work at lower ranks you get issues.
Not to mention child caring issues.
Without considering whether women are biologically designed to cope with sleep deprivation differently to men.
As much as it's a noble idea given the number of deaths from falling asleep at the wheel, I do wonder about the ramifications.
I'd also be curious to see the split between men and women falling asleep at the wheel and whether it's 50:50.