Personally, I think this is a turn for the worse.
We already have a good system. If the lights for vehicles are on green and there are no pedestrians then proceed, else wait.
My understanding, and what my driving instructor told me, is that if there is a pedestrian on the road, you wait.
I can't help think that this new proposal will induce a stoical "target" mentality in people:
Pedestrian "of course I could cross, there was time left"
Driver "it counted down to zero so I moved off"
I keep thinking of those schemes in the continent where all road signs / controls are removed, making people think about what they are doing.
The digital readout seems to go completely against this, as people are relying on an external input for instruction rather than making their own judgement calls. But then, the mentality of the OK population seems totally different to that of other countries. On the other hand, other countries, such as the US, also have trialled these things and accidents have reduced, apparently.
What do others think? Are these countdowns a good idea or not?