Dr. Sarah Rock:

It is just a small point. I agree with Ms Fox. It is a combination of that sort of passive self-policing, so to speak. I have not personally researched it but there is definitely a study that is worth looking at on different models. There are so many places around the world that have different forms of security, be it transport police like with Transport for London or a night guard like on the trains in Sydney. It is worth exploring what other models are out there and critically, how women feel under these different models. That would be a welcome project to undertake. Bear in mind the answer may not simply be a dedicated transport police. It may be something else but it would certainly be worth doing that study.