On my campus, there was this one convex mirror that faced a building exit. I never was told the exact purpose of this single mirror (of which no others existed on campus), but I imagine that its core purpose was to help you see whether a vehicle was coming from around the bend of the building and passing along this narrow pathway so that you could avoid stepping out in front of it. That said, it created the added benefit of allowing you to see if there were any individuals passing by.
In an area where a woman's safety may be threatened by another individual, it would be a value add to have these types of mirrors in particularly windy or creeping corridors and pathways where someone might easily be caught off guard from behind.
This isn't an extraordinarily novel idea since these mirrors are already widely used throughout the US for safety purposes. I just don't know whether they are also used broadly for security purposes around the planet.
The convex mirror allows someone to see around a dark corner and exercise caution.
Convex mirrors allow users to see around otherwise dark and potentially dangerous corners and bends. They retail for as little as $50 and could likely be produced quite cheaply.
What is the need you are trying to solve?
In a case when someone may not be able to have a clear view around a dark or winding space and may risk being caught off guard, this type of mirror would create greater transparency around corners.