Women's Safety in Traffic

where is the evidence that this has anything to do with the fact they have a womb?

Entirely independent of the points raised in this thread, which I'm not sure how far I go along with one way or another, there's a whole lot more that goes into someone 'being' a 'man' or a 'woman' than whether they have a womb/any damn physical attributes/chromosomes or anything like that, indeed some people (myself included) would say that any 'physical' basis of gender is very much secondary to the social construct, i.e. physical characteristics are used, modified and simulated to portray/maintain certain social signifiers which form the actual basis of gender. Essentially, the main thing that makes someone a woman is understanding that they're a woman (maybe the only thing), and it's not especially controversial to suggest that an identifiable group of people who have been exposed to significantly different influences regarding their behaviour compared to another group, may act differently in certain circumstances whn compared to that other group. But there's a lot of theorising that goes on on top of that, which I'm generally never too sure about.
For example men are far, far more likely to be convicted of a violent crime. Where is the evidence that this has anything to do with the fact they have testes? Well, obv it's the kind of thing people love to cook up and theorise about, but the alternative sociological idea provides a model for it without the need for any vaguery or non-scientific hand-wavey theorising.