[ciaranm]

The green man is intended as a sign that it's safe to _begin_ crossing the road - at least in the UK. You'll notice that the man changes away from Green long before the light sequence. That's intended.

[digi_owl]

In various places the green man will start to blink when there is seconds left before it changes over.

[Dylan16807]

Doesn't really matter. The takeaway is that the light timings don't have to change. You would just make the man stop being green earlier.