Nonplussed

This sign confuses me. Firstly, to me, it seems like it is an instruction for the Traffic and not the pedestrian who it is in fact meant for. Secondly, because the way the worky people have placed it means that you look left, when in fact it would be much more sensible to look right and lastly, because even if you do look both left and right , the road that it warns you about is closed after a few metres, so how much traffic is there really going to be to look out for??

Puzzling!