the text description in the file linked to is confusing, but the map on the seond last page
they're pedetsrianising the top (north) and west sides of GS - including 'cyclist dismount' signs.
http://www.ed.ac.uk/files/atoms/files/festival_fringe_2016_-_traffic_management.pdf
I complained plenty about the previous one-way scheme last year which had drivers speeding through the square to get to george square lane.
this may be better. but i'm not sure.
the 'JULY' map looks like what they did last summer, so I'm anticipating carnage again.