I'm just going to give my opinion on this matter. I feel like changing the traffic lights won't really do anything to change the matter. Also, on the topic of feminism, although I can see where feminists are coming from, I think that some feminists are aproaching equality from the wrong way. The goal of feminism is equality for both genders, but by focusing on females, feminism is ignoring the problems of men, which do exist. For example, men serve a higher jail time for the same crime and there are few men in the childcare industry. Of course women also have problems such as a lack of women in the sciences and the higher domestic violence rate of women (believe it or not men also get subject to domestic violence, but to a lesser extent). However, I feel like currently feminism is ignoring the problems of men and focusing just on women's rights.
Regarding the gender gap problem, I think this is caused by the nature of gender roles in society. If I were an employer and in a theoretical example I had a male and a female competing for the same job with the exact same qualifications, I would choose the male. But, this doesn't mean that I'm sexist. I would do this because females are much more likely to take maternity leave and are likely to work less hours, because women generally care for the children. This would be an inconvenience to companies as they lose some of their workforce. Also, because of this, women are more likely to have worked for less time and have less experience than their male counterparts because they spend more time looking after children. So whilst the men further their careers and get pay rises, women are stuck looking after their children and halting their career for their family. I know that this is unfair, but in a capitalistic society where money is important, this is what I'd do to earn more money. So, basically since women are more likely to look after children, because of the societal stereotypes placed on women, they end up getting a lower wage on average. This is unfair and should be changed, but it's just what happens when society is based around money.
Overall, I think that gender equality is a good cause, but I think that feminism is really ignoring the problems of men and focussing on trivial issues such as traffic lights. I think in order to achieve gender equality we need to remove all gender roles in society, which might be impossible. Honestly, although I think gender equality is a good cause, I think that all this money and effort spent on feminism in 1st world countries would be better spent on causes such as improving the living conditions in developing countries, which are places where women usually are abused and are in dire need of assistance.