What does Nice have got to do with it? Well, maybe you haven't been flying for too long, but that southern runway is new, and the parallel taxiway used to be a runway...
Nice since 1979, but whether its layout is new or old I still do not see the relevance.
The old northern runway at Nice is indeed a taxiway now, but it is not twice the width of one of the present runways, and neither is it situated between the two active runways.